Malicious PDF — malware analysis report

Static analysis result for SHA-256 a401922f2a469fa7…

MALICIOUS

PDF

37.2 KB Created: 2020-08-16 22:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c2f2bface40be3428699280702bf9f22 SHA-1: 4539e938cafb27f3a7ea783e05418f480854c981 SHA-256: a401922f2a469fa76043539fece0a05d9e2fc5ff1b9daf207928899825c04fff
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=bring+me+to+life+flute+sheet+music', is presented as a lure for sheet music. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure and link farm suggest a delivery mechanism for further 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=bring+me+to+life+flute+sheet+music In PDF document text
    • http://files.kindredgardens.net/uploads/1/3/0/7/130739742/rubavokujajeluf.pdfIn PDF document text
    • http://files.westhawthornuniting.org/uploads/1/3/0/8/130813042/bumubikikivudan.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/1/0429/7133/2767/files/81377115102.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8243/0117/files/facebook_lite_old_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5480/9756/files/54287856069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/19914529107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/14544361062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/2792/7964/files/composite_materials_wikipedia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/75668889067.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_off00004b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B96 5136 bytes
SHA-256: 10acca37ed30a582aa9a082f180d0d703eea906b6bf7e351a1b2083fe6d2f434
font_01_sfnt_off00005ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE7 13980 bytes
SHA-256: b25442c40a03780b38090ddafe3458521033c0597247987f5c932fe0a8b2db03

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