Malicious PDF — malware analysis report

Static analysis result for SHA-256 793a23d15f47840b…

MALICIOUS

PDF

41.6 KB Created: 2020-08-03 13:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5145dba1ad15ba1311972edff62b23cc SHA-1: ef69bc067be562cc37c56a9aa714f8646372ee77 SHA-256: 793a23d15f47840b89ad9669d9ae6326dbe065ee422ce27b1fb439bdeea2799b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to redirectors designed to obscure the final destination. The primary redirector URL, 'https://ttraff.com/pify?keyword=acca+f9+study+text+pdf+2020+free+download', suggests a lure for free study material downloads, a common phishing tactic. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to distribute 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.com/pify?keyword=acca+f9+study+text+pdf+2020+free+download In PDF document text
    • http://files.sfarc.org/uploads/1/3/1/4/131407388/5847054.pdfIn PDF document text
    • http://files.westerncanineacademy.ca/uploads/1/3/1/3/131383664/lobop.pdfIn PDF document text
    • http://files.thewoodroom.co.uk/uploads/1/3/1/1/131164488/sogopewajabadujug.pdfIn PDF document text
    • http://files.michaeldeaton.com/uploads/1/3/2/8/132815737/4976390.pdfIn PDF document text
    • http://files.bvdtc.com/uploads/1/3/2/8/132816066/5042091.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/1/0435/4444/5092/files/zinanigivaxasodiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3758/1734/files/lugexijewinivodajibetezub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/99049953550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/23415999402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1887/8117/files/19459223836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6604/8164/files/fokagulofipetesekulisufad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4939/4071/files/kavofos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4246/3126/files/gujazurodifuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7345/files/govikevaxofesexov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7423/8102/files/mofawijufabidabakev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2871/6439/files/bejukidasiwusadode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/wsj_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6360/6429/files/bowuxivavosopojediv.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_off000061b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B8 5832 bytes
SHA-256: ba43c7aecd2c0d5ff5914150eae830b856b1d350adf7c7ca93200c8ab1f9d507
font_01_sfnt_off000075c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C2 10360 bytes
SHA-256: 105af12814ae2d50e5096e7d4757d710473287bfd03fd89c1a647c8a76bc047c

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