Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a6b1ab8109c9a0e…

MALICIOUS

PDF

32.6 KB Created: 2020-11-08 02:37:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a426eff43ef39c2ce0cb46b6dc701b32 SHA-1: ad1eaddd11881c6692939200612a5561c2b704c4 SHA-256: 7a6b1ab8109c9a0e01e5d7abf254b9d52d6697e45c380c7697ebbb1768b39e6b
64 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence ML classifier flagging it as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a malicious intent to redirect users. The presence of URLs like 'https://traffset.ru/aws?keyword=baby+rosalina+mii' further supports this, as they appear to be part of a campaign to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 3

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=baby+rosalina+mii PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447084/normal_5fa1477133e24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_5fa097847a084.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://womunulela.files.wordpress.com/2020/11/61268783659.pdfIn PDF document text
    • https://zijuwazomat.files.wordpress.com/2020/11/lil_pump_album_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/liwekijepilawowexizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb60a35-7d2d-46f2-a6fb-6bc80b2f3ab1/masuvikag.pdfIn PDF document text
    • https://wotenopofe.files.wordpress.com/2020/11/budixaw.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/57190619721.pdfIn PDF document text
    • https://sexonilapaxo.files.wordpress.com/2020/11/kotajuwivaxox.pdfIn PDF document text
    • https://bixirofu.files.wordpress.com/2020/11/abs_and_chest_workout_at_home.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa8c08c-bd64-4240-83a2-dedda85b3769/gigetep.pdfIn PDF document text
    • https://xoxedoxiki.files.wordpress.com/2020/11/vag_kkl_409.1_usb_driver_download_wi.pdfIn 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_off000056a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56A8 3244 bytes
SHA-256: 110ad79a1efd5624d43dbd733edb702216260565bc7a129f90994e2dc729e5cc
font_01_sfnt_off0000625a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625A 4712 bytes
SHA-256: 7bce58189d2c76421ea9246080ac2fc6d2acbbbbc484d0607c51d72fc1c97b7a

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