Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f2f4479e999bcd…

MALICIOUS

PDF

39.8 KB Created: 2020-10-16 16:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f7fc54d3c1c86d31251fdec6d33670a4 SHA-1: 55c6c80ec30360aa65870f7a979dbb23db1e184d SHA-256: 17f2f4479e999bcdcd4d08961dcda0b60167b635c3ed479d925d257abc0afca7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Weebly-hosted PDFs, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to redirect users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 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.
  • 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://cctraff.ru/pify?keyword=plantronics+voyager+legend+cs+manual+espa%25C3%25B1ol In PDF document text
    • https://balejumefem.weebly.com/uploads/1/3/0/8/130814467/zekasafoteruw.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/44d87feaf8ee.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/8878959.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/mukobuf.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/b3966e5b09f03ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f8853f434c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367916/normal_5f88cbc9e8083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f87494880ccf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f8976e7760d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f899ed55b1a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373502/normal_5f88ba82ce43c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f8718f3c416b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f894fcde0cd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f88c0a99bbb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8712d7c2fd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f8936ba956d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f87ef52afb17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f87129f5e366.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/1/0496/5633/2437/files/download_game_fort_conquer_mod_apk_terbaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9138/5767/files/rukoronexaxonam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8126/7876/files/1062926617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0768/6817/files/61645480822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6553/6412/files/35172697437.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_off000058cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58CD 5768 bytes
SHA-256: c84c32d8da08e6f29914b0631af568bafb444fd915937e233736545c7ff1f49f
font_01_sfnt_off00006c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C21 10120 bytes
SHA-256: a8c9aaad0a200dcd1dba87d6cd83c979340c0fdc82cf24ea074fd0708af05ddd

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