Malicious PDF — malware analysis report

Static analysis result for SHA-256 829c21499448e98b…

MALICIOUS

PDF

52.0 KB Created: 2020-07-28 17:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 504684bbc4c972dd2b1c9a47f700c6a5 SHA-1: 1ad1091664c7091033b3f4bd73b7c686a1e10147 SHA-256: 829c21499448e98bd78a04a49c674564523259c6b1996bc7afc22179df2e4fe7
194 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically identified as a redirector. The document body, though heavily obfuscated, appears to contain keywords related to online shopping, suggesting a phishing lure. The presence of numerous external links, many pointing to Shopify domains hosting other PDFs, indicates a link farm or SEO poisoning tactic to distribute the malicious content.

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=100+cotton+double+bed+sheets+online+shopping In PDF document text
    • http://files.surfcoastsecondarycollege.vic.edu.au/uploads/1/3/1/6/131637953/2766119.pdfIn PDF document text
    • http://files.millomrufc.com/uploads/1/3/1/1/131163846/fadetinu-rituxutapedo.pdfIn PDF document text
    • http://files.iwstreecare.com/uploads/1/3/2/7/132740479/wogupu-zukokitoruwogog-zikezugufada-pubuzesilas.pdfIn PDF document text
    • http://files.kilkennyarchclub.com/uploads/1/3/2/6/132681823/e8eccbd6c7e29f.pdfIn PDF document text
    • http://files.simplyinspiredrentals.ca/uploads/1/3/1/8/131856326/xerutejuzi_wovufakefakur.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/1/0430/7881/1810/files/xanofesek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6143/5813/files/davum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/12548782380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1321/8210/files/wibomazipurifapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9151/5808/files/tavikak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8784/7843/files/xigexolovegomivapomej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5269/4680/files/363109799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/69241029407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3273/9989/files/83189795125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9433/4869/files/nidoterutotodesufidumuli.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_off00008d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4C 5152 bytes
SHA-256: a88f2c0c38812b93f4e95f7a989f47423af84ce7645ac674838748bdc56e6267
font_01_sfnt_off00009ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EBD 10504 bytes
SHA-256: 8ed0394ed1834f755b182e1e4386f82767338aabfba6e9f080f06552850d4a16

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