Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c1e2a145e0122f9…

MALICIOUS

PDF

47.7 KB Created: 2020-08-07 12:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f644baa7a6596b558e16649c80c4ab7d SHA-1: 302fb3307a22701483a0f09ff7968f5a848e318e SHA-256: 4c1e2a145e0122f9d7a58de7996a592518200710c5a948ea282b254c7010d096
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body, though heavily obfuscated, contains text suggesting a 'car bill of sale' lure, and the embedded links are designed to lead users to potentially malicious content. The ML classifier strongly indicated maliciousness.

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.com/pify?keyword=car+bill+of+sale+ga+pdf In PDF document text
    • http://files.100x35online.com/uploads/1/3/1/0/131070151/da987a30.pdfIn PDF document text
    • http://files.detroitbiblequizzing.org/uploads/1/3/0/7/130739379/familovi.pdfIn PDF document text
    • http://files.magistrasolomon.org/uploads/1/3/0/8/130873983/gixopora-wijikiwiratobok.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/1/0428/8570/9987/files/wadapavodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3094/3643/files/gireb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6343/1588/files/modelo_de_certificado_medico_bolivia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/bovuzem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/vexuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8819/1396/files/2929214736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/67720038245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8846/8376/files/58471087223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5480/7717/files/acdc_big_balls_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/74989964753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/41860471882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6132/1621/files/creer_preterite_conjugation.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_off00007b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3D 5256 bytes
SHA-256: 51790949b559923a1df4e72d898ed91d56ba1342a2bca414008d5e5f2cb3e486
font_01_sfnt_off00008d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D24 10820 bytes
SHA-256: 12a15087ff40f6114b23ce4ecc07dc5cd2cf7c3eb6c6adafaec7af0e2a3e178c

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