Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d9715fd0d43495…

MALICIOUS

PDF

44.2 KB Created: 2020-08-06 09:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 976bda459679b60ad87e48c3eacda878 SHA-1: 4d3a0ac106fcf925cae990a346b3a3bf69527908 SHA-256: 17d9715fd0d434951bf9d8df26d0f72fd79034dd05c1b13f4ac081a11830498a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body, though obfuscated, contains text related to 'Chinese chess openings pdf' and the redirector URL, suggesting a lure for users to download potentially malicious content. The presence of a link farm and a malicious redirector indicates a phishing or malware distribution attempt.

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.com/pify?keyword=chinese+chess+openings+pdf In PDF document text
    • http://files.forestermusictherapy.com/uploads/1/3/1/3/131397955/dobevemepefov.pdfIn PDF document text
    • http://files.jscsbc.com/uploads/1/3/1/3/131378771/viraxofob_netufe_mulafisiw.pdfIn PDF document text
    • http://files.corinnehollowayart.com/uploads/1/3/0/7/130739318/f0ac9e3fc.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/1/0432/2181/1362/files/pokimalifuworobelugedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1717/3149/files/tinoxidixanoguxalasiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6294/2106/files/66165916616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6331/1513/files/31407249121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/char_broil_turkey_fryer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0419/8038/files/86871621007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7727/1706/files/fadevapizuredawigibawin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1888/7073/files/38150809836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/bekekudeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9207/3895/files/coffee_break_french_free_download.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 4

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_off00006f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4F 4984 bytes
SHA-256: d6492d768bf725433fd96a56696965411d2fd10bde41410ca763ada3498482b5
font_01_sfnt_off0000804a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804A 10436 bytes
SHA-256: 82d18ec8e2e9bd78598e6bb151f376d57742b918d6c0378da8d87e2d512c6e1a

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