Malicious PDF — malware analysis report

Static analysis result for SHA-256 638c9226227402e9…

MALICIOUS

PDF

46.8 KB Created: 2020-08-16 21:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c990407d8982aef1a934bb40655bf0b6 SHA-1: 58b19a17ff45a77d9707373c9210c98efb891a25 SHA-256: 638c9226227402e9a667211f753a7e90bf3415b159e59cc0f0a8d1a87f475c9b
182 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=playstation+now+android'. The document also exhibits characteristics of a link farm, with many links pointing to external PDFs. While no scripts were extracted, the presence of malicious links and the ML classifier's high confidence suggest an intent to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=playstation+now+android
    • http://files.meredithcarro.com/uploads/1/3/1/6/131637384/8035850.pdf
    • http://files.superiormachineandfab.com/uploads/1/3/2/8/132815154/5810631.pdf
    • http://files.jacksonandthepoolsharks.com/uploads/1/3/1/3/131398221/wesixukin.pdf
    • http://susewa.klmlodge.com/uploads/1/3/0/7/130738697/lanuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/5958/2878/files/livejunibajaminabumiwe.pdf
    • https://cdn.shopify.com/s/files/1/0450/5364/0856/files/62434956150.pdf
    • https://cdn.shopify.com/s/files/1/0428/5943/0054/files/beef_lasagna_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/jusujanudomatologoditet.pdf
    • https://cdn.shopify.com/s/files/1/0433/3817/0523/files/download_python_for_windows.pdf
    • https://cdn.shopify.com/s/files/1/0438/6953/6411/files/audi_a4_manual_transmission.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/grados_maduracion_placentaria.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/autobots_in_transformers_the_last_knight.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/biodegradation_microorganisms.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/adwords_basics.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/riwegulesejenavinumadediw.pdf
    • https://cdn.shopify.com/s/files/1/0439/4778/6398/files/chemistry_o_level_notes_download.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_off00007883.bin
6995fee6a6560b4301e6a949799b927b80b32463a7236b0c9008e0414d9d1dc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7883 5012 bytes
font_01_sfnt_off000089ad.bin
1669f55864bb137a738bf7a0e3b475f63fed368dfaed0cb3beba3b9aebeffde2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89AD 10776 bytes

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