Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9c55893cdf3d77…

MALICIOUS

PDF

51.1 KB Created: 2020-10-20 23:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 75dedef9670026c73301d60f23c4170d SHA-1: 32392d60bf8e50de515652227e993a550ec161b7 SHA-256: 0e9c55893cdf3d7763b42c2b21ad32f17162014c936f0a483479789d49f7115c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to `ttraff.club`, which is flagged as a malicious redirector. This indicates an attempt to direct the user to a malicious site, likely for phishing or to download further malware. The document body and metadata suggest it is a lure related to 'computer networks protocols standards and interfaces'. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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 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.
  • 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.club/123?keyword=computer+networks+protocols+standards+and+interfaces+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372384/normal_5f8e326ed2c11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381980/normal_5f8d8ac389a27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370529/normal_5f8871ee2a789.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f888c5669342.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/4c54c21.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/lefexoserizemojogi.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/vopetasubaz.pdfIn PDF document text
    • https://bigogewoxof.weebly.com/uploads/1/3/0/7/130739615/dakititefotinira.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f87ae98541bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_5f8c5a96c50c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5f8ab53541ea3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zuxadol/58303701996.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/fodifok.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/5077646844.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/45257444011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbad6a0d-ce16-462c-a53e-e9c0256f9a6b/zenezani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca91223-2b01-4163-ad3c-720fa2a7a7db/99453816185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d5c88b9-c225-44db-8a2b-c0ba231f10d9/amar_bhitor_o_bahire_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a6fbb2-cb12-4f13-a6d1-e2f7349a0c4a/23561864042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ea2bea-e4db-47e1-8275-4d4d18e7a3e4/futolenowolifafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/11562951998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7482/5621/files/yenidoan_kistik_fibrozis.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B4 5364 bytes
SHA-256: 34d0ea8ca05b7d17ce287585398dba8b760454f28d3c6a4c51ae3a9023e877ce
font_01_sfnt_off000074ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74EE 10220 bytes
SHA-256: 944223b01fa091f26c772e5bad93fe95294d4a2a57e951821f032fe881ab270d
font_02_sfnt_off000097a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97A0 16844 bytes
SHA-256: 4e201d8d965deb862e9ada8a1fdb494de9cc18ced729f7f6ae4b9530184d6656
font_03_sfnt_off0000af61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF61 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176