Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b93b82ff8724556…

MALICIOUS

PDF

42.6 KB Created: 2020-08-25 00:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1533f81f90bed5aa29912cebfdbbbed6 SHA-1: 8e34edea7638bf7606ad9bd26502387d81e6ec2e SHA-256: 7b93b82ff8724556ba6561452725bfd989bc6916e0250133b6d8dd305743e804
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this redirection scheme. The presence of numerous external PDF links, many pointing to benign Shopify domains, suggests a link farm or SEO poisoning tactic to disguise the malicious redirector.

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=high+voltage+transformer+testing+procedure In PDF document text
    • http://files.northmetroweekday.com/uploads/1/3/1/8/131856954/bububawujitigudevup.pdfIn PDF document text
    • http://files.mrfixitroofing.com/uploads/1/3/1/4/131453006/6caa5f.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/1/0429/2270/5055/files/xelapejamafud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1828/7266/files/step_down_transformer_design_calculation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/gakatuxakurojager.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0843/4081/files/naberafuloxanivojutuzelaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1254/6975/files/denon_avr-_s710w_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/dalenikakez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8198/2361/files/biology_class_9_chapter_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3184/5271/files/19972800083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/brothers_conflict_episode_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0545/1174/files/zonuwoworodalu.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 4

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_off0000660d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660D 5592 bytes
SHA-256: c53567e4a0917d03f9bf9076b3f46803f0d9e4439dc23ed2e91914e1cec043f1
font_01_sfnt_off000078e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E4 10900 bytes
SHA-256: 96ba3e2a2ef1ee56179b156e96c1685d15d364dfdda7e14cd097c4a64dbe5459

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