Malicious PDF — malware analysis report

Static analysis result for SHA-256 b53b0f046809cab2…

MALICIOUS

PDF

43.9 KB Created: 2020-08-02 08:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9f591661be13486da21b093e7aafe579 SHA-1: d0224dad2a5bb56102546e746594f3855afd36de SHA-256: b53b0f046809cab25ec59b211b052c7d2f9297845f63169d8f82f9c73c31d098
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the string 'Copious dogs mod' and the malicious redirector URL, suggesting a lure to a malicious site. The presence of numerous external PDF links further supports the attack pattern of a link farm designed to distribute 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=copious+dogs+mod In PDF document text
    • http://files.compassionvet.com/uploads/1/3/1/6/131606069/9206395.pdfIn PDF document text
    • http://files.gracebaptistlockport.com/uploads/1/3/0/8/130813366/nupov.pdfIn PDF document text
    • http://files.fldvipn.com/uploads/1/3/1/4/131438439/1319896.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/1/0433/0687/7080/files/xubeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9581/8397/files/dirotojumonenatuvije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/57888092811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5552/0667/files/vosedup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3854/files/vefur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8266/9461/files/51959327871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/77654421744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/wirorapafixutojigereme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xikidewutuxazumal.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off00005b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B03 4848 bytes
SHA-256: 851e73e416ab60c9c2e37e8c8b4721e9862b37b92f3395c6b9b733fa80cfb14d
font_01_sfnt_off00006b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B70 10148 bytes
SHA-256: 73229e6b16c5b21ef3f1c0a21c33130fe81c9e0691c5d1d100741173e7c012fc
font_02_sfnt_off00008e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E70 16064 bytes
SHA-256: 6f41d85279102efce3c4bd26fddb767baf9b68a4f55e239fba9bedc2a2d3b953

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