Malicious PDF — malware analysis report

Static analysis result for SHA-256 bec5d8b6dfd13dda…

MALICIOUS

PDF

40.4 KB Created: 2020-08-09 00:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e911f1da048e140f470dd18670832fd4 SHA-1: 5177e85244144e3df66d91ff5696a36b33c0df7c SHA-256: bec5d8b6dfd13ddac193003acee63e12fc34c78f702b712c0d3b670659bebcfb
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to a URL designed to lure users with a book download. This redirector then leads to a PDF hosted on a CDN. The ML classifier also strongly flagged this PDF as malicious. The document body contains the redirector URL and several other PDF links, suggesting a link farm or redirection scheme to distribute malicious content.

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=lecher+antenna+book+pdf+free+download In PDF document text
    • http://files.lifeontherockinternational.com/uploads/1/3/0/7/130739169/jinevowomipunaraj.pdfIn PDF document text
    • http://files.primarytackle.com/uploads/1/3/2/6/132681062/8183264.pdfIn PDF document text
    • http://files.forehandfinancial.com/uploads/1/3/1/4/131438111/367ceaa27.pdfIn PDF document text
    • http://files.durhamregionroofing.com/uploads/1/3/2/7/132712234/5326070.pdfIn PDF document text
    • http://files.sockfetishsocks.com/uploads/1/3/0/7/130739783/674585.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/1/0433/7837/6867/files/majav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/10540713037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2199/1079/files/12083528010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0996/6239/files/duwukodotozupijinunajot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/43917941965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9773/5843/files/23621867487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/4813127380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3367/4396/files/73783193452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/75411562569.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_off000060dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DC 5300 bytes
SHA-256: c18b735ef8a995ec9ef75fc43aa974fffa2ba79a09a78e08deef6484f85b80c0
font_01_sfnt_off000072f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F3 9828 bytes
SHA-256: d01b36d21d388f41674ae9581aac901fc607d75df00c02dc499de65b017c8ee8

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