Malicious PDF — malware analysis report

Static analysis result for SHA-256 853da2360a1e6978…

MALICIOUS

PDF

45.9 KB Created: 2020-08-21 09:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3e3e4cf375147381f7136b19e553a16b SHA-1: 66b59dfb625ad73e70a133127bc0f2c47c769936 SHA-256: 853da2360a1e697857b0fba425d243249f4fcee1f7a7b9a07338129c701087af
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) that is flagged as malicious. The document body, though partially garbled, includes the same malicious URL, suggesting it's intended to trick users into clicking it. The presence of a link farm and a redirector indicates a phishing or scam attempt, likely to deliver a secondary payload.

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.cc/pify?keyword=administra%25C3%25A7%25C3%25A3o+de+marketing+las+casas+2006+pdf In PDF document text
    • http://putavu.obsidianrenewables.com/uploads/1/3/1/1/131163774/8547438.pdfIn PDF document text
    • http://files.litesquares.com/uploads/1/3/1/3/131398544/1236910.pdfIn PDF document text
    • http://tuziref.findjasper.com/uploads/1/3/1/4/131482996/14d2c202.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/1/0430/4912/3993/files/5803252179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1464/2069/files/bexuxevanabuvinopuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1184/1949/files/35923092797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/acceptance_sampling_in_quality_control.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5396/4712/files/nefoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2121/9493/files/kubativubuwakotesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/76924262414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tekutuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4086/4421/files/labunawufesero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9800/4899/files/kisuselif.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 5

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_off00005fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAD 6244 bytes
SHA-256: 6454309a64526cbd5ce8aa7af20104717a4944dda4146fceec63fe1a27bfb547
font_01_sfnt_off000073ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EA 12992 bytes
SHA-256: 8ee40254ea8938350f340ef207bc2db5f40c462de69e730f1ad792699209988c
font_02_sfnt_off00009a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A42 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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