Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff728335a1e6293a…

MALICIOUS

PDF

45.0 KB Created: 2020-08-09 20:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 82475d7d02d9d214fc2a3c11c2414b5b SHA-1: 0047599d6c166ded742537c224bd138073bea15f SHA-256: ff728335a1e6293aef81b294833f12175b3a5a22caad99cdaac7f11ced3d3585
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, including a critical redirector link to ttraff.com, which is known malicious infrastructure. The document body and heuristics indicate a link farm strategy, presenting itself as educational material to trick users into clicking malicious URLs. No scripts were extracted, limiting the analysis of further payload delivery.

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=arterial+blood+gas+journal+pdf In PDF document text
    • http://files.ithacaymca.com/uploads/1/3/1/8/131871602/tavunerutivog.pdfIn PDF document text
    • http://jejegi.summoningstone.janaoliver.com/uploads/1/3/1/6/131607163/boxakazoloxodo.pdfIn PDF document text
    • http://files.stapletonfarm.com/uploads/1/3/0/8/130814115/xizibat.pdfIn PDF document text
    • http://pibikuwi.trattoriatotarobyob.com/uploads/1/3/2/8/132814930/tefavaxumujexuko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7222/3387/files/grade_11_biology_textbook_mcgraw_hill.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8221/9674/files/calendario_escolar_2020_chile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34680977850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4053/7750/files/download_steam_for_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3851/5098/files/al_arabiyyah_bayna_yadayk_book_1_part_a.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0667/3574/files/texas_form_503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/libibijoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9358/0189/files/28180780468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/bavafozirowiwavel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6314/6656/files/wanusiranomisotitot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6401 5296 bytes
SHA-256: 0c5cc4832adead1ab7cc13b2785c4a532ac4123e3967500a2033bafe6c6f0e90
font_01_sfnt_off0000760a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760A 10352 bytes
SHA-256: 88182e88127c8ecb4ee1d817e5dc2168660871573cfa4a2ddea4ff607f1af3a0
font_02_sfnt_off0000994e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x994E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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