Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c6b1a569a1d7b7…

MALICIOUS

PDF

36.1 KB Created: 2020-08-01 11:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09b44574c8513fe50d057e7906051444 SHA-1: 7c44e4a0b78659598d5f720cb7624e375bed85a8 SHA-256: 14c6b1a569a1d7b7ab4ee33ad30ef758f20762feb1f2efdcae788ea7984ac96d
194 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body also contains sequences that resemble command-line arguments, suggesting an attempt to execute commands or exploit vulnerabilities. The presence of many external PDF links, some pointing to benign Shopify domains and others to unknown file hosting sites, indicates a potential link farm or phishing lure.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.ru/pify?keyword=wow+display+id
    • http://files.shifaacounseling.com/uploads/1/3/2/6/132681164/9451692.pdf
    • http://files.evergreentrackingdogclub.org/uploads/1/3/0/8/130814043/7304091.pdf
    • http://files.spccmd.com/uploads/1/3/0/9/130969428/2637841.pdf
    • http://files.christiestimber.com/uploads/1/3/1/4/131438059/2a5c43dce8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5298/9601/files/jafotorutoviluregegoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2761/1300/files/516399124.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vojinanekarab.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7775/files/bufujoletetuwuludur.pdf
    • https://cdn.shopify.com/s/files/1/0430/4044/0471/files/fafewebabufusotutapi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2538/3073/files/tofupofi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/45409736146.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/445156572.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tedogunugovosilogupex.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5984/files/68421650601.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/xepisugofurexikidu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/fixetekufetoxofowig.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/subnautica_lifepod_19.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fc7.bin
edd44b563b1651ec0dab08db3dd5673c1ca78453f6666dad6e36ead86f4c63fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC7 5064 bytes
font_01_sfnt_off00006134.bin
064603ab516d92b1c8a0d9b9e0f55cb0305348df464efc741cfe4ff4bb353926		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6134 10192 bytes

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