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) First seen: 2026-05-09
MD5: c990407d8982aef1a934bb40655bf0b6 SHA-1: 58b19a17ff45a77d9707373c9210c98efb891a25 SHA-256: 638c9226227402e9a667211f753a7e90bf3415b159e59cc0f0a8d1a87f475c9b
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, including one pointing to a known malicious redirector 'https://ttraff.ru/pify?keyword=playstation+now+android', suggesting a phishing or scam attempt. The presence of a large number of PDF links also indicates potential SEO manipulation or a link farm tactic. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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) or Microsoft license-boilerplate 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 In PDF document text
    • http://files.meredithcarro.com/uploads/1/3/1/6/131637384/8035850.pdfIn PDF document text
    • http://files.superiormachineandfab.com/uploads/1/3/2/8/132815154/5810631.pdfIn PDF document text
    • http://files.jacksonandthepoolsharks.com/uploads/1/3/1/3/131398221/wesixukin.pdfIn PDF document text
    • http://susewa.klmlodge.com/uploads/1/3/0/7/130738697/lanuj.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/1/0439/5958/2878/files/livejunibajaminabumiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/5364/0856/files/62434956150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5943/0054/files/beef_lasagna_recipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/jusujanudomatologoditet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3817/0523/files/download_python_for_windows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6953/6411/files/audi_a4_manual_transmission.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/grados_maduracion_placentaria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/autobots_in_transformers_the_last_knight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/biodegradation_microorganisms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/adwords_basics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/riwegulesejenavinumadediw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4778/6398/files/chemistry_o_level_notes_download.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_off00007883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7883 5012 bytes
SHA-256: 6995fee6a6560b4301e6a949799b927b80b32463a7236b0c9008e0414d9d1dc1
font_01_sfnt_off000089ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AD 10776 bytes
SHA-256: 1669f55864bb137a738bf7a0e3b475f63fed368dfaed0cb3beba3b9aebeffde2