Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a42b7eb6743b67…

MALICIOUS

PDF

45.3 KB Created: 2020-08-04 11:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 54c509d7284c25adfddfbd5419637e9b SHA-1: 1fd1f3f2e32c00d5f384578d60583b232bca8914 SHA-256: 38a42b7eb6743b67242a5173c8bb62df6c4b442ef9306207e43d70e4f03d28d3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to reading comprehension PDFs and a URL that appears to be part of the redirection chain. The presence of multiple external links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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=reading+comprehension+for+adults+intermediate+pdf In PDF document text
    • http://files.suearchibaldart.com/uploads/1/3/0/7/130775448/54aced9efb54.pdfIn PDF document text
    • http://files.valnettoyage-sarl.ch/uploads/1/3/2/6/132681824/11a4be.pdfIn PDF document text
    • http://files.joenorrellart.com/uploads/1/3/1/4/131453248/2102519.pdfIn PDF document text
    • http://files.shorklabradors.com/uploads/1/3/0/8/130814043/dokeja.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/1/0437/6517/0334/files/bodhisattva_ideal_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1966/4542/files/xijalomogebajoxaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/bakesexotuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7552/6042/files/react_native_zoom_in_animation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3871/0696/files/34510531462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2758/6457/files/lefimuropifefuxozuxel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/50051627954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9338/4599/files/sexowazom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4985/1811/files/zakevafotuletopitomaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2292/6492/files/13565487927.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_off00007150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7150 5576 bytes
SHA-256: 27953b6d5410667370603c61af9ea7c10c2cae356ec3c2fd134b246362be4dce
font_01_sfnt_off00008427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8427 10604 bytes
SHA-256: ca90f2dbb959d578b51832b4e1b1ba7ed88d6488b3599613f822385c2ac15908

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