Malicious PDF — malware analysis report

Static analysis result for SHA-256 6324a2e35dab3248…

MALICIOUS

PDF

45.6 KB Created: 2020-09-10 22:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e8605ed1d374f79303baf5ee98217c77 SHA-1: 4432676107df36fce645774da56ad98beb6a9820 SHA-256: 6324a2e35dab3248992d7da9e0f9cfaa9a5de8c07fd256eb98c18112a1cf00ea
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF files, suggesting an attempt to create a link farm for SEO manipulation or to distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.club/wix?keyword=cookie+sheet+chicken+pizza In PDF document text
    • http://files.catnip4cats.com/uploads/1/3/0/8/130814258/a251c.pdfIn PDF document text
    • http://files.aartismithmadan.com/uploads/1/3/1/1/131164129/68c89870.pdfIn PDF document text
    • http://werute.insightenergy.ca/uploads/1/3/1/6/131636725/6da0c528cfc4.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/1/0429/6481/1935/files/61741217369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/pifore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/33467385538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6598/2632/files/bisuvufok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0133/8280/files/zopixiralitip.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b48b60_54633374f98d4e2d888b13e9ccd36aa5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f2ef67_64a05106eef94f87b7ee5fa27d23eb43.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b463f2_6e7877cca6994c6fb66d3c85d1b95268.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b58d21_57b4e7b303924d45946df77f2cdf5312.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C50 4912 bytes
SHA-256: cbf805810b6e77e584718dc9488a813a192c453fa5f0a30a539c7123c8e77c83
font_01_sfnt_off00007d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D08 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00008596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8596 10420 bytes
SHA-256: 03ad783bf99c0df9cfbee4fe80a128adaa9f57fb06da06bf257046c0694997a0

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