Malicious PDF — malware analysis report

Static analysis result for SHA-256 af74a821512d37f2…

MALICIOUS

PDF

41.9 KB Created: 2020-08-21 16:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 92d57f8c2cd42baad2e6f5d31e990402 SHA-1: 14c437ea7178510c82c739f1bd436eea9c72483d SHA-256: af74a821512d37f27f4c8c69cdfca09da530efb8f938a1a2c3e9044d277b8168
194 Risk Score

Malware Insights

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

The PDF file contains a link farm and a specific malicious redirector URL, disguised with a lure related to a 'biochemistry lab report template'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the primary link leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic suggests the document is designed to generate traffic through numerous outbound links, many of which point to benign Shopify domains but some to unknown domains that could host further malicious content. No scripts were extracted from this sample.

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.ru/pify?keyword=biochemistry+lab+report+template In PDF document text
    • http://vasud.annaengels.com/uploads/1/3/1/6/131636648/relaxobi_kikerogikazuvo.pdfIn PDF document text
    • http://files.tmichaelstone.com/uploads/1/3/2/6/132695535/zokibatifanijelajis.pdfIn PDF document text
    • http://wiguwux.juiceboxfargo.com/uploads/1/3/1/6/131606183/2af402f76959.pdfIn PDF document text
    • http://fofiwo.mymodernsolutions.ca/uploads/1/3/1/4/131438500/1206732.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/1/0430/9758/7861/files/rap_rhyme_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/36411329092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7079/8489/files/94288970956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/bobakedasap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/renokalumidagovizuzakota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8108/8670/files/illustrator_reduce_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pufabupenidobuxix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/buku_standar_akreditasi_puskesmas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6195/3191/files/betipatowesitubag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6502/4412/files/money_and_barter_system.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_off00006592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6592 5464 bytes
SHA-256: 07134766d2add0f1ea78f4cc9a9281e90e2798e921769e3a187e7de3384dd3cc
font_01_sfnt_off000077fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77FD 10212 bytes
SHA-256: a6b4c571588e5b2ed2b80c206540560ffce8fce761aaec33dd885fcd449a4e19

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