Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3dccc86116611ef…

MALICIOUS

PDF

50.9 KB Created: 2020-10-15 23:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bcaa031b996c33eb6e8bad9f0f5b1fd1 SHA-1: 66c09064fbbcb9cca65b1c485575299aeb0c36fd SHA-256: e3dccc86116611efe0fbad42866a6f4e57e3dc8f5a6b90facff8c4bc7d1eb7e5
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to external PDF files hosted on various disposable domains, indicating a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://ttraff.link/pify?keyword=offline+maps+%2526+navigation+android+app', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/pify?keyword=offline+maps+%2526+navigation+android+app In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/3794757.pdfIn PDF document text
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/zeputem-pozaseneforiveg-debusobadul-kijeko.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/449102.pdfIn PDF document text
    • https://kusanogiwaxug.weebly.com/uploads/1/3/0/8/130873987/0bcc16b14590cb.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lonevu.pdfIn PDF document text
    • https://site-1038547.mozfiles.com/files/1038547/61709616602.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/206302.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/vepulakanug.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/tepuput_goludogonok_molul_gekagur.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bf4458.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/xududev-ledavodu-jatulivarolaxe-bixebenal.pdfIn PDF document text
    • https://site-1041933.mozfiles.com/files/1041933/jesagepekuzuvegoteluger.pdfIn PDF document text
    • https://site-1043090.mozfiles.com/files/1043090/mizoxovoj.pdfIn PDF document text
    • https://site-1040180.mozfiles.com/files/1040180/divopakogenowis.pdfIn PDF document text
    • https://site-1037869.mozfiles.com/files/1037869/wikufemavirudizunape.pdfIn PDF document text
    • https://site-1040878.mozfiles.com/files/1040878/10034929194.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8732e1260b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f8829b218177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5f87ef9422d3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368777/normal_5f8818f264543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f8715101d8ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2296af4a-c9d9-4c0d-becc-ad28e8b1935a/68593215288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b02459e-8e96-46e4-b447-8bd2f2881c52/85375371679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0836b187-7b57-46b0-9622-4b19f4e7eac7/rokefifixunabuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e3ab09-b2ff-494a-a1c2-6e435379e65d/45327265000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1f2fc91-0103-4306-8294-03aeba190826/98503726094.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009fca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9FCA 18460 bytes
SHA-256: 251b895a0ce53a17d068c201fc592f21331c46c397bf446e251a471c951954fe
font_00_sfnt_off00006bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC2 4980 bytes
SHA-256: 1acbe46cd18f346983af26ea4bd057c521c16888b10dc88f49326e42c529812a
font_01_sfnt_off00007c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9B 10240 bytes
SHA-256: 40642d8a9392acb356330ff204f1a96667a995366429270472023e55c8a17ff6