Malicious PDF — malware analysis report

Static analysis result for SHA-256 335b22627fee3e01…

MALICIOUS

PDF

47.7 KB Created: 2020-08-11 14:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: de4974d17e5fedb4c4262045f2ba2366 SHA-1: eeec5ee895710d57c3834e3bea15f879c3e4608d SHA-256: 335b22627fee3e013ffb885c88f677674f58450042631b6fa60fbc5e7e8ded3a
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning attack designed to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be the malicious redirection.

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=esl+pronunciation+practice+pdf In PDF document text
    • http://files.townofolathe.org/uploads/1/3/1/4/131483097/4ab18f5aa88e1.pdfIn PDF document text
    • http://fodetafe.dfwiscebs.org/uploads/1/3/0/7/130738568/fba9b559a8731.pdfIn PDF document text
    • http://files.laughingbuckfarm.com/uploads/1/3/1/4/131438002/surenu.pdfIn PDF document text
    • http://files.businessmanagementorganizer.com/uploads/1/3/0/7/130740127/57d8c.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/1/0429/1664/2975/files/how_to_create_a_makefile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3258/2056/files/nafedupirinugezuwogokev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/guia_de_alimentacion_para_diabeticos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/83126331251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/jadusunixiset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/computer_arch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/tivugus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1779/7785/files/wenupoduraro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/puxesoronupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7569/7830/files/academic_writing_skills_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5946/8701/files/69179816444.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB5 3292 bytes
SHA-256: 06a9266efec998f21103f8c55b4360a9dbffa3e62e1332608945dda6d041e7c4
font_01_sfnt_off0000779e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x779E 5108 bytes
SHA-256: efa03c1ea7afab29d2a124e88a7aa3ed27058f54ef7d552d841ba548458ed5d0
font_02_sfnt_off0000890d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x890D 12064 bytes
SHA-256: 4da3a6b066b622f0350a281bda32727258a96f8e28a81fa9d9523d812bfc4064

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