Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9703139c01c0aa…

MALICIOUS

PDF

37.3 KB Created: 2020-08-03 12:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bed968edd08cf8e277c3781c3b2db785 SHA-1: 445ee4efa2c3b3844d60eace9380e43e8be6e364 SHA-256: 5c9703139c01c0aaf8d496f955f3842a7c03675ee4f38049be4ca42f43b3c911
234 Risk Score

Malware Insights

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

This PDF document contains numerous links, many of which point to a redirector service known to host malicious content. The document body itself is heavily obfuscated but contains URLs that are likely part of a link farm designed to lure users into downloading further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.ru/pify?keyword=wood+splitter+fanfare+pdf In PDF document text
    • http://files.sfafs.org/uploads/1/3/1/4/131406668/xafitupanone-sejowugakotuse-ruviz.pdfIn PDF document text
    • http://files.internationaltravelingclassroom.com/uploads/1/3/0/7/130738637/7124892.pdfIn PDF document text
    • http://files.severnanchor.com/uploads/1/3/0/7/130776388/084085.pdfIn PDF document text
    • http://files.moonriverdesigns.ca/uploads/1/3/2/6/132681880/835b31aad.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/1/0432/0247/8237/files/14486364009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9327/0429/files/73306835411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/43027083611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0773/8019/files/92726885567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/78907568054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1556/0616/files/23354279885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6003/5735/files/minemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7927/0549/files/18769849076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/27615318268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2534/9283/files/vedudib.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 5

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_off00005443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5443 5048 bytes
SHA-256: 1a7fced565c4b58d04f33497a9bf238127a6779ba810fd6abdda1e88cfad4ded
font_01_sfnt_off0000658b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658B 10320 bytes
SHA-256: b14bcd996342de1eb472e809c471b7e955e1e74270f196d4021a6c4684befeb1

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