Malicious PDF — malware analysis report

Static analysis result for SHA-256 8533db8cbedf55b2…

MALICIOUS

PDF

43.7 KB Created: 2020-08-01 19:11:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a09a2ce524fafad74d3d08fecf06a4f3 SHA-1: c407fc68a1b2761b54246ec17b26ea88b87af3c5 SHA-256: 8533db8cbedf55b2d94d30d2117d94776effbc75a9b26b0f60f1a9316f624c07
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector URL (https://ttraff.ru/pify?keyword=what+happens+at+an+engagement+party). This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of malicious redirector links is a strong indicator of a phishing or scam attempt.

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=what+happens+at+an+engagement+party In PDF document text
    • http://files.vermontventure.com/uploads/1/3/2/6/132681219/437369.pdfIn PDF document text
    • http://files.trapwingfestival.com/uploads/1/3/1/4/131408970/kitirefonug.pdfIn PDF document text
    • http://files.inbetweentheories.com/uploads/1/3/0/7/130775475/zodolat.pdfIn PDF document text
    • http://files.neuroactiveexercise.com/uploads/1/3/1/4/131413550/d2814f.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/1/0431/2439/2087/files/8388829489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/vasesen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1319/2349/files/25443929651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3658/0757/files/99176182857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7604/3423/files/74587447829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4760/6679/files/pip_install_not_working_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2858/4347/files/51112067481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/votekiviju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kexuxedixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3165/7621/files/bufebowesadirajemupiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2712/8735/files/jimifopufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7180/7381/files/dedejuku.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 4

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_off00006da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA5 5316 bytes
SHA-256: 1ccf4c400b91656d7bf0710d0af614cbf3d0ff1849e4a619e155918a572d0755
font_01_sfnt_off00007fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA1 9996 bytes
SHA-256: dc048ee97711d823c8a635516e51032611b5f1645e713b97c2f1260e9758d97a

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