Malicious PDF — malware analysis report

Static analysis result for SHA-256 131b7efe801ddca5…

MALICIOUS

PDF

39.8 KB Created: 2020-08-23 05:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 86a75449b81d20cd1c4ea04a267043b6 SHA-1: 75ff2bdd83dda7540b863a66ba1044cfc5c63433 SHA-256: 131b7efe801ddca5b9363dcc69d95ac47a2fd40db3aead2562b6d23bd5f8e67a
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though partially garbled, contains the URL 'https://ttraff.com/pify?keyword=7+point+likert+scale+template', which is also flagged as a malicious redirector. The presence of numerous PDF links suggests a link farm or phishing attempt to drive traffic to malicious sites.

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=7+point+likert+scale+template In PDF document text
    • http://files.yukimuli.com/uploads/1/3/1/6/131636941/papedaxez.pdfIn PDF document text
    • http://bupadof.softcinch.com/uploads/1/3/1/3/131380504/dd7776096a0e34b.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/1/0437/3469/6097/files/nijegaletepimodotoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/86376045090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/american_accent_training_pronunciation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/lagu_lily_cover.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2132/6742/files/85369088866.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7533/8389/files/airtel_tv_exe_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6731/8167/files/ace_academy_gate_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/62480426588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3311/6315/files/2652489172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/sarixu.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 8

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_off00006003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6003 5128 bytes
SHA-256: b30c3fadaa84d19effef3dba06e5d5144d880ab4e9d171e237287731616a6d43
font_01_sfnt_off00007154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7154 9620 bytes
SHA-256: 85c8258dcf37bf789bc86ba353174ae3b9c11b17b748a236bb0e3d9ec139cd0e

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