Malicious PDF — malware analysis report

Static analysis result for SHA-256 732f1711b3946f53…

MALICIOUS

PDF

46.4 KB Created: 2020-08-12 17:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ab5b1740bd0181f4feb3ed198317b80c SHA-1: 0eecfa894b903897ee45223ab65a258ae55e83d1 SHA-256: 732f1711b3946f536409c0a4150f69515a29d81b826322f0f79df1a6c2853144
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. This suggests an attempt to lead users to malicious content, likely disguised as free book downloads. The presence of a large number of external PDF links further supports this SEO-based lure tactic. No scripts were extracted, but the core malicious functionality relies on the embedded links.

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=kosala+book+pdf In PDF document text
    • http://gixifef.liftislandfashion.com/uploads/1/3/1/3/131379362/8764926.pdfIn PDF document text
    • http://files.opadental.com/uploads/1/3/1/3/131379594/539cbd45a69b.pdfIn PDF document text
    • http://files.ryanballonlineportfolio.com/uploads/1/3/0/8/130814515/fofesifu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/97980093387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7584/5792/files/vobazidiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufotiniponekurek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2802/7304/files/20005618934.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/muxefanuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0413/2508/files/99940532053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/ncert_class_10_science_acids_bases_and_salts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9943/7721/files/gonujekufamep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1514/2551/files/the_ultimate_kiss_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6381/2002/files/2599425977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/boiler_feed_water_pump_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9805/3535/files/39329755299.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDE 5112 bytes
SHA-256: 48404417b59cc55178d7dd0c254cbf82acee65af75657de6efc0f40b784b32f5
font_01_sfnt_off00007f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F52 9940 bytes
SHA-256: 23753fee9d003df5de164991bd80fd8fbd6ac1af761177ceb276e2a17587fa8a
font_02_sfnt_off0000a1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B3 2776 bytes
SHA-256: 7828f37bcf3dcfe1ab1716748fc459e532a0e97fdd5253fa45e3e7042ed51a85

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