Malicious PDF — malware analysis report

Static analysis result for SHA-256 723d8772801258e9…

MALICIOUS

PDF

52.8 KB Created: 2020-08-17 16:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 83f9ffc294e8647d89ab51fbba6389fa SHA-1: 29fbc9306f079646f742d29e684dbce81b079b94 SHA-256: 723d8772801258e92f49812204b21be5e751045c111551d45848d24d79d01e7c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document body, though heavily obfuscated, appears to contain the same redirector URL. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic to distribute 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.ru/pify?keyword=travel+guide+hanoi+vietnam In PDF document text
    • http://files.halloweeninthehills.com/uploads/1/3/2/7/132740277/9902579.pdfIn PDF document text
    • http://files.whispersisterstudio.com/uploads/1/3/0/7/130775868/juwufizabubimu.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/1/0432/3383/7224/files/avery_business_card_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62114329075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1921/4756/files/56134907414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/kuwigiwuzeturadowadod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35031547028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7909/7758/files/34201552349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/60400805857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/wasameja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2513/6792/files/navewepenizuwuleromaj.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_off00008685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8685 5072 bytes
SHA-256: 1a2fbda6d4927da8d79563ff49fe7167a38d0310605703f1b644b02883b43857
font_01_sfnt_off0000978d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x978D 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000a01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA01B 11472 bytes
SHA-256: eaa8b0cd7ba5a94111776fdb96fa4f2205dd7932accd6679594bf2dddbf2374e

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