Malicious PDF — malware analysis report

Static analysis result for SHA-256 a35b43a0941918f3…

MALICIOUS

PDF

44.1 KB Created: 2020-08-20 23:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 280aedefa0425ce45b94217da22c6b52 SHA-1: 118923721f59fba5c3e752992b968793f53edef6 SHA-256: a35b43a0941918f3c41dcc9989c04909ed4d5dec8b8fb27de0960df5a5274230
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'used car inspection report sample' and the malicious URL. The primary malicious URL, 'https://ttraff.cc/pify?keyword=used+car+inspection+report+sample', is designed to redirect users to further malicious content. The presence of numerous shopify.com links suggests an attempt to blend in with benign content while hosting 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.cc/pify?keyword=used+car+inspection+report+sample In PDF document text
    • http://riroka.trianglerefugerecovery.com/uploads/1/3/1/3/131380275/782b3ac424847.pdfIn PDF document text
    • http://kajumo.celiacpsychce.org/uploads/1/3/1/4/131406071/balifunok.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/1/0438/4371/5229/files/43255899237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/12960620644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4089/7189/files/rate_zonal_centrifugation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4021/9037/files/factorio_8_to_4_belt_balancer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8336/6551/files/96844400019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1185/8855/files/1398011045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/continuing_professional_development_record_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6545/0391/files/72938907946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/wp_engine_log_in.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 1

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_off00006f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F42 5212 bytes
SHA-256: c30271e746d0e88f90ec20bcce5ed05e6e85a3e1470f00228a38166a1690086f
font_01_sfnt_off000080d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D9 10300 bytes
SHA-256: 38abd30505bf682bbc7a296727192ee24bd8d226aec588f0d8eb063fbbc9650b

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