Malicious PDF — malware analysis report

Static analysis result for SHA-256 6631bf3f7078e345…

MALICIOUS

PDF

43.8 KB Created: 2020-07-29 17:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 063a14ab29b5598111c475900c567cf2 SHA-1: eaf5e026eae201039ba834d26fde1c4b113e9bb4 SHA-256: 6631bf3f7078e3456b3e3b177b1e45ccf0b0a0e4fe1ee50c01443df4d4f3e656
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service that is known to host malicious content. The document's content, though heavily obfuscated, appears to be a lure for downloading a file, likely a payload. The presence of multiple SEO-optimized links suggests an attempt to distribute malicious content widely.

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=ap+sachivalayam+question+paper+pdf In PDF document text
    • http://files.littlegemscreations.com/uploads/1/3/1/4/131437421/d0108.pdfIn PDF document text
    • http://files.texasredtoypoodles.com/uploads/1/3/0/7/130738673/gikibaz_wosixupemubawer.pdfIn PDF document text
    • http://files.sluadg.com/uploads/1/3/1/6/131606984/81f77199.pdfIn PDF document text
    • http://files.requestequestrian.com.au/uploads/1/3/2/7/132710565/firumegufu-tijepesof-mobuju.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/1/0431/9143/5422/files/98811370775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4442/2310/files/5690473682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4818/1666/files/95832903922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6850/5764/files/rawewiluvasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tipibag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/gololawaxitebutopexare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/jasukezegadumugeloxofazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7010/3452/files/26167760991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/bebuvevowezabasodos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32732230761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/76820847513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8982/1845/files/nugifetenopewif.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_off00006de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE1 5556 bytes
SHA-256: 37236f353681ef98e2821e1cdc057f9181a7c54ba5298dc546e6f7fe0cc842a7
font_01_sfnt_off0000809e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x809E 9736 bytes
SHA-256: 77e9b61f454dd264c7a9c4cab4565c9ad4a9a8eba0b88ee3a417c4c2d53c0c37

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