Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4889ce1507c4167…

MALICIOUS

PDF

49.9 KB Created: 2020-08-10 13:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb62cebe3943eaed8803fb8171d99a07 SHA-1: e42ed2dfe7c740dd0988643411fa7eab97dcf1ac SHA-256: a4889ce1507c4167043e9d41e88e2a9dc466e1a69fc9506b57751d6f70f9f0d2
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The document body, though heavily obfuscated, contains a reference to the same redirector URL. This indicates a phishing or scam attempt designed to lead users to malicious content.

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=genetic+counselling+review+pdf In PDF document text
    • http://files.princetondogtrainingclub.com/uploads/1/3/1/4/131438308/mituwo-vesuz.pdfIn PDF document text
    • http://files.wchahillclimb.ca/uploads/1/3/2/6/132695741/3d3a80d3.pdfIn PDF document text
    • http://files.thearcsusquehanna.org/uploads/1/3/0/9/130969002/3172501.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/1/0439/5152/1947/files/10858906884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0749/0717/files/mimelaxisususunipajugola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/meditation_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0329/7438/files/nigavinexusotisifadede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/66093306255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4603/3818/files/wokod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4472/4133/files/bebotetoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/18183560902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/54957087048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8334/1728/files/losumagofova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/bescherelle_la_conjugaison_pour_tous_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9232/9116/files/28232367169.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_off00008535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8535 5296 bytes
SHA-256: ad163143b98c94a5d49a2321c70bee3b8cfb9b40678ac8703b9f9d383fb120e5
font_01_sfnt_off0000976c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x976C 10524 bytes
SHA-256: da39c1e45845ddacb0f107326e6a4c19ae572e8d2a4bc0d4b890e2f7abdaab4f

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