Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdfdc4d045d495a3…

MALICIOUS

PDF

32.4 KB Created: 2020-07-31 23:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 72a38fa64aaab262e275db9570fae2e6 SHA-1: e60fd9ca94f022481b2b81cc4ab02066938d9f64 SHA-256: bdfdc4d045d495a392a5e92d98d3e7d074e8fd5b9d2f0845a0a114e15940ae5d
194 Risk Score

Malware Insights

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

The PDF was identified as malicious due to its inclusion of a link farm containing numerous external links. One of these links, 'https://ttraff.cc/pify?keyword=thermodynamics%253A+an+engineering+approach+pdf', points to a known malicious redirector. The document body contains metadata and URLs, reinforcing the finding of a link farm designed to lure users to potentially harmful 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=thermodynamics%253A+an+engineering+approach+pdf In PDF document text
    • http://files.thenewportshow.org/uploads/1/3/1/6/131607943/4db7c5210.pdfIn PDF document text
    • http://files.awpovrug.com/uploads/1/3/1/3/131379990/vuvubuvavitufir.pdfIn PDF document text
    • http://files.brazil-yellow-virus.com/uploads/1/3/0/7/130775223/7818106.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/1/0428/1637/2892/files/mivomeribok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/bolano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0371/5489/files/25825140634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/30361923744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4225/9612/files/gevow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/2728827267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9327/0429/files/paxojixoledusenewuvebepat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/55503632582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/mefibowipideval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/56087654304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vinujavezo.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_off00004285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4285 5640 bytes
SHA-256: 34a070c9b3d4f2f434b73d113a3d94758a2420e6bb270663de9e126474fee169
font_01_sfnt_off00005592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5592 9048 bytes
SHA-256: 3999f97ba80a5515596375fc0ab114b540dfd66aebd0b9f33bd42ccb10aa729a

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