Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceff41f0f2b8176e…

MALICIOUS

PDF

40.7 KB Created: 2020-08-23 10:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6446afc626758ed567642489a0dbe830 SHA-1: 8a695f1b0e64e7b5619f1c28063a524f4a728b90 SHA-256: ceff41f0f2b8176e30f34c93d15e5f1b8be444c97fe4c2a282eff8619fadec65
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc' with a lure related to an 'AMI BIOS update'. This link is embedded within a larger collection of PDF links, suggesting a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, contains the same malicious URL and several other PDF links, some of which are confirmed benign, but the primary redirector is the critical finding. The primary intent appears to be directing users to malicious infrastructure via a deceptive lure.

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=ami+bios+update+free In PDF document text
    • http://files.gpuuc.org/uploads/1/3/0/7/130776196/xulexokawo.pdfIn PDF document text
    • http://tufafige.diybuilds.ca/uploads/1/3/1/1/131164462/nafefo-xuwikajarekune-kafanepilu.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/1/0431/0705/7825/files/60780249240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/8987/5364/files/pdf_to_word_converter_free_for_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/mapa_carcassonne.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/24679079699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/7309/8143/files/how_to_make_ender_portal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/27293907037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8135/8759/files/zesap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5441/3462/files/wovisuzozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8292/4441/files/gepulobim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/8114/1143/files/ben_10_movie.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 3

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_off0000628a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628A 5284 bytes
SHA-256: 50be02fa8d8cd9d288c7f25660d6d7d233f6375bf20a6bbb3fe0a9aa9fe9e0fd
font_01_sfnt_off0000745e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x745E 10112 bytes
SHA-256: e04adaf2862d5ff5a9517213c6c63e94941b0e56959dc7d3053ca036dfa194bc

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