Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc13611ddfe390d7…

MALICIOUS

PDF

44.6 KB Created: 2020-08-11 16:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f1d695baa1e0c91b67a096c3614d4daf SHA-1: 0ec5dfa80bf6ff1123ea985f73a129ff60da0105 SHA-256: fc13611ddfe390d70d13421e41e3c32084856fdfe0d5ffb3636f0f053577eb9d
194 Risk Score

Malware Insights

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

This PDF document exhibits malicious behavior by hosting a large number of external links, a technique often used to distribute malware or lead users to phishing sites. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=vintila+corbul+caderea+constantinopolelui+pdf', is identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness.

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=vintila+corbul+caderea+constantinopolelui+pdf In PDF document text
    • http://ketoze.coolcayenne.com/uploads/1/3/1/1/131164250/bizokiko_dibuxudabun_gogigaxolevuv.pdfIn PDF document text
    • http://files.neonopen.org/uploads/1/3/2/6/132682293/dc75c.pdfIn PDF document text
    • http://files.brite-technology.com/uploads/1/3/1/4/131438077/95d545188f5e.pdfIn PDF document text
    • http://files.batonrougedumpsterrentalpros.com/uploads/1/3/0/9/130969166/kirosejopimipora.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/1/0431/0279/7986/files/zepogikiviwafaraz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7078/3645/files/latemes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3683/3952/files/free_shredding_st_louis_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4915/5740/files/types_of_multilingualism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/netherlands_tourist_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0692/4712/files/58791842175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tikifulodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/kigimimavelukebabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/97707190838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/sedimosivowone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/55757814548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6723/5742/files/37913008080.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_off00007111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7111 5252 bytes
SHA-256: 041e493a0264631cfc335219322e55d352541bdffcb81809752ad33407062f1c
font_01_sfnt_off000082ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82EC 10076 bytes
SHA-256: 83bc2a19ca3a0507fd24500647b280af7bce0a54736cf068c9bf17a7d9413a4c

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