Malicious PDF — malware analysis report

Static analysis result for SHA-256 6166377575e14d55…

MALICIOUS

PDF

50.4 KB Created: 2020-08-09 04:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c9ab85737720e3f91ac09609d8c0a913 SHA-1: 9b92b089ee87208ecbb04d6ac8d00d5c927ca4a8 SHA-256: 6166377575e14d55e32465bc7458d18c9256f1aa82f2616ccf5d7202c11a40a1
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDFs, many of which are hosted on Shopify and appear to be part of an SEO link farm designed to attract users searching for specific document titles. The primary redirector link, 'https://ttraff.ru/pify?keyword=management+of+abdominal+compartment+syndrome+pdf', is flagged as malicious and likely leads to a phishing or malware distribution site. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector confirms the intent to lure users to a harmful destination.

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.
  • 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.
  • 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=management+of+abdominal+compartment+syndrome+pdf In PDF document text
    • http://files.automatedcablesolutions.co.uk/uploads/1/3/1/4/131407980/sisazivizika-fofonuto.pdfIn PDF document text
    • http://files.catherinedonzephotography.com/uploads/1/3/1/8/131856646/voxili.pdfIn PDF document text
    • http://files.webblox.com/uploads/1/3/1/6/131637896/rakepakotijopoz.pdfIn PDF document text
    • http://files.rustypistolsreloaded.com/uploads/1/3/0/8/130874253/wituled.pdfIn PDF document text
    • http://files.marcusciderfest.com/uploads/1/3/0/8/130813357/dolilomu_tubireneper_womawadavalo.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/1/0433/4085/7494/files/ponopowofisew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9582/6336/files/91053739301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/practical_flow_cytometry_in_haematology_diagnosis_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/74982257534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/gigegozosojepuwuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/diccionario_biblico_reina_valera_1960_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8048/2967/files/46611341765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5282/5767/files/vopuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/iteration_of_rational_functions.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6495 5724 bytes
SHA-256: 677ce4327773317b521d4ae8990dfc1a15319c94537d267eb113973f366c247c
font_01_sfnt_off00007803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7803 1944 bytes
SHA-256: 25fed082716b4c514fcc72778a3f2d07a7a852112776a5e152aa7dfdfb2df464
font_02_sfnt_off0000814e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814E 10248 bytes
SHA-256: c4b4626cf6d79c88c231b902a415fadfa02ec0dea9b0f04ddac51abdb5e7a60f
font_03_sfnt_off0000a3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FD 16312 bytes
SHA-256: b2563e85233037e3c2780690ed1455257f868516b5a962e54e6ffe29314c9cb1