Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d72031cbc83b2d…

MALICIOUS

PDF

60.2 KB Created: 2020-07-30 17:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5dfed858af53f797d130f23335351a36 SHA-1: 030cdd95f0369e93a9eec6a0cb1a5133a9bbcbf8 SHA-256: d4d72031cbc83b2dd6698eaac7f6fff6b8bdb1dc81fbbe126de693f4d98b8cd1
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body text, though heavily obfuscated, appears to be related to search terms for 'short stories for grade 2 pdf', suggesting a lure to attract users. The primary malicious link identified is ttraff.ru, which is flagged as a malicious redirector.

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.ru/pify?keyword=short+stories+for+grade+2+pdf In PDF document text
    • http://files.mysterytomb.com/uploads/1/3/0/9/130969469/benobun-gojupavolu.pdfIn PDF document text
    • http://files.stoneycreekfarmmeats.com/uploads/1/3/2/6/132681479/bowuwutigiroza.pdfIn PDF document text
    • http://files.susanmastalsfoundation.org/uploads/1/3/1/3/131383698/6328ca54e9d7866.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/1/0432/2754/5763/files/fojolen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/lofimejuwakofifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4921/2311/files/55063138869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/85319349649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5647/1959/files/2893171205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6346/0508/files/84618678115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87745409623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3464/8474/files/sajajotitunuxekurovelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6482/6773/files/8539186493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/nafixerosabitawatitika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/2613722707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/82837271485.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_off0000ae88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE88 5188 bytes
SHA-256: 4c19dc60db72adb2b4264c15908ef44a0e2fa033bc8425c581f087a4cbbd9b9f
font_01_sfnt_off0000c03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC03F 10304 bytes
SHA-256: 678d1aca75a90fa755defa0705ffb0a49be02785f536f91f66711ee009884cf3

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