Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec71632e3d23baa7…

MALICIOUS

PDF

33.8 KB Created: 2020-08-15 07:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4013ed31afcd9dd231775b7eabe13e9a SHA-1: 93f269541f950dcf9b4ca6a63f7f1dc9e25a6aa3 SHA-256: ec71632e3d23baa7eeea18a03e5d5a1ad0f7faf02e8a23e0804cbcfb8c4adb02
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains references to a car manual and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent. The presence of numerous PDF links, many hosted on Shopify, indicates a potential SEO poisoning or link farm strategy to distribute malicious content.

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.com/pify?keyword=2010+chevy+impala+ltz+manual In PDF document text
    • http://files.sussexeyecenter.com/uploads/1/3/2/7/132740445/ff0ce374cba13.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/1/0440/7685/9557/files/47704160817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2794/5889/files/marchen_awakens_romance_anime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7985/0391/files/43274509477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4440/5397/files/3807555109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9696/4261/files/14158085843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6504/0282/files/lunabozumez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/statistics_mcclave_12th_edition_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3234/4736/files/zipimeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/zosasiliterepok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3348/1636/files/associative_memory_in_computer_organization.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 1

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A0F 5340 bytes
SHA-256: 165a81e2a1c1ebcafcad23a5668815e37476514bf0925663f301489249f54385
font_01_sfnt_off00005c2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2C 9060 bytes
SHA-256: 0529ac0b5e9c13d6605b8d34535b617a1c21cb2f563c1ac09d457adb40e88758

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