Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d1f71b04cec0307…

MALICIOUS

PDF

43.2 KB Created: 2020-10-16 07:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 40dc08028e540f7287b77f94657ddcce SHA-1: 1d47d2b6139e2711b6c06a1766d4e2df82e73264 SHA-256: 8d1f71b04cec030736dc6a14a05c8d39601c8eb86347775518878e5c018719d7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, containing numerous embedded URLs. One of these URLs, 'https://ggtraff.ru/123?keyword=daily+devotional+guide+post', is flagged as a known malicious redirector. The document's structure and the presence of many links suggest an attempt to direct users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ggtraff.ru/123?keyword=daily+devotional+guide+post In PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/8d82963.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/maxarox-tamepiwa.pdfIn PDF document text
    • https://jiwadurator.weebly.com/uploads/1/3/0/7/130776405/gitiwebopusose.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bamudepekepa_setumazowido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f87607392aa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373769/normal_5f88d73389bf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f86f5035ca95.pdfIn PDF document text
    • https://site-1038414.mozfiles.com/files/1038414/8114821061.pdfIn PDF document text
    • https://site-1038961.mozfiles.com/files/1038961/kezewujopopiwat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f875ca846f49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_5f8839ac8d094.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_5f89182e1ddac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f8915508c9c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f87a436e3955.pdfIn PDF document text
    • https://site-1037907.mozfiles.com/files/1037907/62892984511.pdfIn PDF document text
    • https://site-1036996.mozfiles.com/files/1036996/45352723640.pdfIn PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/32772347807.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9260/9691/files/manual_de_la_buena_esposa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9327/8372/files/steam_friend_code_where_to_find.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5932/2778/files/sum_and_difference_identities_tangent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/43392146716.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB6 5192 bytes
SHA-256: 7ce34c3bfd0df5a43d3fdda09305228bfd53f952c3e2778a6d5d90816264787e
font_01_sfnt_off00007c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C88 10268 bytes
SHA-256: 584ea7bf1d757e15c673fc9de0befa090bdf21a691552ae9b9686380e04ab834

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