Malicious PDF — malware analysis report

Static analysis result for SHA-256 f81003c1c7bb6a76…

MALICIOUS

PDF

42.1 KB Created: 2020-08-03 09:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: db029c826fafdf9cc1871e9ce8f5b454 SHA-1: 84ea5f39dbe653d9a0fb1545aa39b32d30038a7e SHA-256: f81003c1c7bb6a765d4c7aa4ec4c80f9f4e0d8aeee9bdbcc9875a1372a4a77b0
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous embedded links to other PDFs hosted on platforms like Shopify. The document body, though heavily obfuscated, contains the same redirector URL and a reference to a Shopify-hosted PDF, suggesting a coordinated effort to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness.

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=say+it+aint+so+tab In PDF document text
    • http://files.hunnicuttscience.com/uploads/1/3/0/8/130813701/saxuvoxesev.pdfIn PDF document text
    • http://files.retreatsinbeing.com/uploads/1/3/1/3/131381720/9ceea3ac5.pdfIn PDF document text
    • http://files.ursulawestwood.com/uploads/1/3/1/6/131606115/d8156b95328.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/1/0430/7727/1703/files/busakeferukavupunedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8935/3117/files/26918597096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/gazirosagezituvom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/zipeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/64400695427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2881/4760/files/54122500772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/2857162219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/59008157403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0794/0520/files/6103699446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5444/8286/files/sajetakuzan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3178/9721/files/xavenizumoguk.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 6

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_off00006062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6062 4896 bytes
SHA-256: e3b98bda7b61140b93aa02f551d4243398e67ec396b1c72170ce126cae7cd252
font_01_sfnt_off00007125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7125 13512 bytes
SHA-256: b869c04a50e48ec0e0dfdea9d84c804b9da41fe484d14ca548898aedd95a27a4

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