Malicious PDF — malware analysis report

Static analysis result for SHA-256 271678a13781d7f4…

MALICIOUS

PDF

74.1 KB Created: 2020-08-01 05:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4438d69e7ff5ea674c563521486de0b SHA-1: 0969490d1ce83a5afc5ac4343c024a24c8f44009 SHA-256: 271678a13781d7f4847d93e9a636146e45280ec0f2b69c446ad6b30cd85eaded
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a technical support lure for "driver power state failure". The link directs to `https://ttraff.cc/pify?keyword=driver+power+state+failure+windows+7`, which is flagged as malicious. The document also hosts a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO poisoning or traffic redirection. No scripts were extracted, but the presence of the malicious redirector and the lure indicate a phishing or malware delivery attempt.

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://ttraff.cc/pify?keyword=driver+power+state+failure+windows+7
    • http://files.umbrellaville.com/uploads/1/3/1/6/131637374/7143080.pdf
    • http://files.erikageierphotography.com/uploads/1/3/2/6/132681767/41d3fef77a.pdf
    • http://files.morethansparrows1.com/uploads/1/3/0/7/130738531/691de90e2ba087.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/66648992775.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8298/files/60634420212.pdf
    • https://cdn.shopify.com/s/files/1/0431/8114/6280/files/lekotaxizivifomomejexov.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/vamisuxiza.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/serakubalopobonumatux.pdf
    • https://cdn.shopify.com/s/files/1/0437/5012/9813/files/59461094371.pdf
    • https://cdn.shopify.com/s/files/1/0436/9419/4843/files/47622627059.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/33617645071.pdf
    • https://cdn.shopify.com/s/files/1/0429/4246/4163/files/27676157909.pdf
    • https://cdn.shopify.com/s/files/1/0430/4781/3269/files/94759060332.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/91135520716.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8c1.bin
6bc6184879886153e1ab57ab4865204d6e7c1d64d13c40c59b9efe6ac4004752		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C1 5148 bytes
font_01_sfnt_off0000ea6c.bin
346a06d523e333b810206626f013a18ac2a03b8acafc24c2cc4ad325d9bb70dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6C 10052 bytes
font_02_sfnt_off00010cbd.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBD 4324 bytes

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