Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8e31cd709da782a…

MALICIOUS

PDF

48.0 KB Created: 2020-07-31 07:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9f467ebbcaba16e4c3225f48995f8034 SHA-1: f79647cacdef9af0054a7ce6d113a95cba0940a9 SHA-256: a8e31cd709da782ae37a8d35968ad408ac8e42aab0a0fa8910c400fd9c898eb4
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, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, appears to be related to car transmission systems, likely serving as a lure. The primary attack pattern involves redirecting users to malicious infrastructure via these embedded links.

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=automatic+gear+transmission+system+in+cars+pdf In PDF document text
    • http://files.rockpaperjoy.com/uploads/1/3/1/3/131383764/suzegututeza-menaxa-givimuzope-wufitamaz.pdfIn PDF document text
    • http://files.pjsjerky.com/uploads/1/3/2/6/132682342/tilepidudux.pdfIn PDF document text
    • http://files.cookiesnobcrochet.com/uploads/1/3/1/3/131384573/1b2ff4283.pdfIn PDF document text
    • http://files.middletownfamilypharmacy.com/uploads/1/3/0/7/130775231/cbca23f27a3.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/1/0428/9835/8432/files/dojedeteremedadedarovir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/dajovatinerutomopefarol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1827/3446/files/31722906603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7261/7637/files/25801832292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6653/9673/files/luvijiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/1264999074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/62706232642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6839/9524/files/99097640159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/31686906953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/pizimajuxusijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8039/9513/files/18087250397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6415/6582/files/61515663357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/16479736856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/bidunedutexaf.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 2

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_off00007efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFC 5416 bytes
SHA-256: 9c501959cdcca945ceb29c0834f3e100f9051ec2ed2a2d9abf41f5296251ab04
font_01_sfnt_off00009150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9150 9612 bytes
SHA-256: 4eca3d42c3c1c2350f3e3f76b9ed80681383c4e657dc6d3e1c3970b91f723578

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