Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ef844225c6f669…

MALICIOUS

PDF

41.0 KB Created: 2020-08-24 23:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1505e00620ebd56ea038718ec0d6cb8a SHA-1: f028cf821cd7b865c96f9fbad01495a9db348cf3 SHA-256: f1ef844225c6f6699b71b78864cb8d8e04ae6228f0a95736ec7b33d47184cc8e
194 Risk Score

Malware Insights

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

The PDF contains a prominent link to a known malicious redirector, ttraff.cc, disguised as a public hearing request. This link is intended to lead the user to a malicious site. The document also contains a large number of embedded URLs, many pointing to Shopify, which is characteristic of SEO link farm abuse to obscure malicious intent. The ML classifier 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.cc/pify?keyword=requerimento+audiencia+publica+reforma+da+previdencia In PDF document text
    • http://files.sheplayswithmud.com/uploads/1/3/0/7/130776276/xorunurew_warem.pdfIn PDF document text
    • http://files.mcclellandtownpresbyterian.org/uploads/1/3/1/4/131482832/4805624.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/1/0443/8661/5462/files/logolokivav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7314/9859/files/applied_drilling_engineering_solution_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0144/6551/files/pedepubatijirusisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/future_self_journaling_holistic_psychologist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5338/7674/files/university_of_toronto_campus_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/56643162935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5156/3670/files/civ_5_civilization_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/mofagemovipoxorurawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0264/1059/files/447836107.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 2

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_off00005dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFD 5456 bytes
SHA-256: 4a293281d5a594b1c2e91cfe7a175681aaee00131e565406fe92a3ef7890a612
font_01_sfnt_off00007078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7078 12080 bytes
SHA-256: d877dcf874943cb0544053893cc59fa599812c0b6f8cd240f310f92f74fa6d79

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