Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d280cd346b0f75…

MALICIOUS

PDF

41.7 KB Created: 2020-08-15 01:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5868ed36da10a85de237225dbaec1c9a SHA-1: 83300d9e32190b66ee04fd64a9cce9c4e9c22006 SHA-256: f5d280cd346b0f7547c3e797ba8dac19921353d2c7e4fe114b15f706f5d13fdf
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.com/pify?keyword=ceiling+function+google+spreadsheets, which is likely part of a SEO poisoning or link farm scheme to distribute malware. No scripts were extracted, but the PDF structure and embedded links strongly suggest a social engineering attack.

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=ceiling+function+google+spreadsheets In PDF document text
    • http://jizenir.cowboystoo.com/uploads/1/3/1/4/131438177/lotabumanepipiw.pdfIn PDF document text
    • http://files.sudensuukon.com/uploads/1/3/1/4/131454304/4267584.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/1/0435/2134/3647/files/kajixokuterokomuzuvuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5730/7039/files/apprendre_le_franais_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/bilukewolal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/11670907061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5025/3979/files/57329837763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/verbal_ability_test_papers_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5639/0551/files/41546128689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/atoms_and_molecules_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0131/5491/files/dasob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1421/8151/files/27253130000.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_off00005b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B30 5320 bytes
SHA-256: ef901cc31b524478e1c9b710a5a0fc84f4c8e53e5a1edacb804fbd7df8e97b17
font_01_sfnt_off00006d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3E 14236 bytes
SHA-256: 5a44e06490c7ee4f35579a556737192b88e6ecc373d04c17f0a48e17bcc9c240

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