Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9c639bafa4bba9…

MALICIOUS

PDF

38.0 KB Created: 2020-08-01 12:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6795f9117fef876fc42bd05b73dd268d SHA-1: a14fbbb70e6c8591e7b1def69a0548a65ba45032 SHA-256: ce9c639bafa4bba932c9b1803e285e3dd371f18ebdadf52010076d99f4610c2e
202 Risk Score

Malware Insights

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

The PDF file contains a high number of external links, many pointing to potentially malicious redirectors. One such link, https://ttraff.ru/pify?keyword=bobcat+753+specs, is flagged as a malicious redirector. The presence of a 'download button' heuristic further suggests a lure to trick users into clicking these links. No scripts were extracted, but the structure indicates a link farm designed to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=bobcat+753+specs In PDF document text
    • http://files.taradennyimages.com/uploads/1/3/2/6/132696263/dimesafipoxeruzeg.pdfIn PDF document text
    • http://files.teambuildingdays.org/uploads/1/3/1/4/131407029/6623359.pdfIn PDF document text
    • http://files.haveaseatcolorado.com/uploads/1/3/0/7/130738748/d270e3c56.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/1/0435/4542/8127/files/31732116238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3292/6616/files/vilufidiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/85542005800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/98817324795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81599599528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5672/5153/files/nusawejume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8529/9876/files/91404971471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/xobujakixovofoxodepines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9286/9281/files/26847269159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2688/9369/files/98399353717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5269/4680/files/56097550313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4456/0281/files/bebabemagulifitonire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5443/8302/files/wasupuniwafarit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4395/4594/files/jojazalebifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9754/6149/files/53401942219.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5599 5356 bytes
SHA-256: cca64d57be019508702eb5f64e0169c2df0c3a0a95f5b2754b1879d6e31e0bf2
font_01_sfnt_off000067f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F0 10372 bytes
SHA-256: 640694f16b5af3f9173090dd03c53d16af26f16e817e2ff384eb6aeea201e8e4