Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80d90023836760a…

MALICIOUS

PDF

40.2 KB Created: 2020-07-27 05:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0129b7ca9ad485dd604666bc4b131968 SHA-1: 5faa8f383b660bebc4163390491c9b499e6eca20 SHA-256: e80d90023836760ac01c3c1aaac71037f54a133a95f14d47b609520636afcc92
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, a common tactic for SEO poisoning and redirecting users to malicious sites. One of the primary links points to a known malicious redirector, ttraff.ru, which is disguised as a search result for piano sheet music. The ML classifier also strongly indicated maliciousness.

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=ballade+in+g+minor+piano+sheet In PDF document text
    • http://files.college-elf.com/uploads/1/3/1/4/131407051/nafife.pdfIn PDF document text
    • http://files.hollylima.com/uploads/1/3/0/7/130740517/ead3d1f11d2.pdfIn PDF document text
    • http://files.romancewaiheke.co.nz/uploads/1/3/1/4/131484133/4526697.pdfIn PDF document text
    • http://files.chopinsocietyofhouston.org/uploads/1/3/2/7/132741064/kirinefawororowe.pdfIn PDF document text
    • http://files.highgearcoaching.com/uploads/1/3/1/3/131383514/4b1c5.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/1/0428/3446/0828/files/durifiziwugizugutuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/jotixiruwodobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4283/8427/files/boxosajawuxoxageke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/535035237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3554/2182/files/divopisugutowufezigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/86555835409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/4663703139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3859/6511/files/61878075158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4722/2422/files/vokorirujobepugezud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4913/9880/files/50503885771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/44133902402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7908/9824/files/sediwelija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7390/4545/files/jifibuwid.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD6 5208 bytes
SHA-256: 016b0576bc1e603ea41fe188fc742cf8c4fa1aa9346ec019e8048ac4ca68800d
font_01_sfnt_off00006c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4C 12336 bytes
SHA-256: 89d3b1602520fa7acc308c631c7e2dffca4de112ac53bc2eb9e78fd612f4a558

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