Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9b020f1136bcbd3…

MALICIOUS

PDF

43.1 KB Created: 2020-08-14 22:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 521acbcc83a6b2b2ea19f3e45e514002 SHA-1: b11784acf730e867ddb5215be2756d8d271bccbb SHA-256: f9b020f1136bcbd314215162cca9d6cc3d954250cab4fae51bc1c0b7e06636e0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'log and antilog table pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous external links, many pointing to Shopify, indicates a link farm strategy to improve search engine ranking for 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.ru/pify?keyword=log+and+antilog+table++pdf In PDF document text
    • http://files.wcchakrahealing.com/uploads/1/3/1/3/131381374/8786177.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/1898351737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4951/7205/files/55402656339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/79856843053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1323/2024/files/vimozosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6863/7862/files/ziruwelobubalotigopam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9493/1624/files/astm_soil_testing_standards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0124/0992/files/70700109759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7853/3799/files/vazepatuwuw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE7 4804 bytes
SHA-256: cbc87f3a0575e0fa62697850399c38a98379bbd47ad3e03bb1cb179dc0a8dac7
font_01_sfnt_off00006f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F51 10184 bytes
SHA-256: af43d18ae1301fb8d95bc19e5b436658fbc90c589517d7b1bffdf56e42e3420a
font_02_sfnt_off000091da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91DA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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