Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7fe6a37b8948023…

MALICIOUS

PDF

43.7 KB Created: 2020-07-26 00:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2e30bd3ba309304ac3e8a1c8773aecf8 SHA-1: 20be09dd4a19b9f2996a8b72ec049911a63f9274 SHA-256: d7fe6a37b8948023181b251a54e0e3f362f3b8097f571320a363937d90955ed1
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it's a malicious redirector, specifically designed to lead users to external content. The embedded link 'https://ttraff.com/pify?keyword=biochemistry+questions+pdf' is flagged as a malicious redirector, and the document body, though heavily obfuscated, suggests a lure related to 'biochemistry questions pdf'. The presence of numerous external PDF links further supports the SEO link farm tactic.

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=biochemistry+questions+pdf In PDF document text
    • http://files.wendybrockman.com/uploads/1/3/1/1/131164462/sonaw.pdfIn PDF document text
    • http://files.chittendenpreventionnetwork.com/uploads/1/3/1/3/131382982/jodivuxedo.pdfIn PDF document text
    • http://files.ontmoetpalestina.nl/uploads/1/3/2/6/132695470/3958713.pdfIn PDF document text
    • http://files.gnteachers.net/uploads/1/3/2/7/132710669/7faa63be.pdfIn PDF document text
    • http://files.warehousechurch.org/uploads/1/3/0/9/130969129/786e29.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/1/0433/0792/5654/files/40006964266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/84535799503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/83387592981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6376/9243/files/fagipiganinusiragovolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3339/5353/files/7256606033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kofuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/bawiwolun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/pixuxoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2823/3887/files/mezolap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/gesabijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/xorefumonoveken.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/megovenudilusubum.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 6

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_off00007062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7062 5312 bytes
SHA-256: 61270eb3b00303a2467a1b6886e23da25b46318fb228da2aced21233ad6d9209
font_01_sfnt_off00008245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8245 9324 bytes
SHA-256: aad23cb5ffe072b9153fd2d93e399d251a6b86b77117ea2f4927d6c632ec95f0

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