Malicious PDF — malware analysis report

Static analysis result for SHA-256 a545646434ac6e46…

MALICIOUS

PDF

37.6 KB Created: 2020-08-21 09:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 801b60ea3c92448f343c59f4ed9c97a5 SHA-1: 567fc008fa7069ce307c6555f88bdcdc5acfc2c5 SHA-256: a545646434ac6e46508ae9178bb1f62c440f61e29628361982d26ea8e4f5defc
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains multiple embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. Another heuristic indicates a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The presence of a 'download button' lure further supports a social engineering attack. The primary malicious URL identified is https://ttraff.ru/pify?keyword=insoluble+solid+lab+report.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=insoluble+solid+lab+report In PDF document text
    • http://files.chicagoyouththeatrefest.org/uploads/1/3/1/6/131606101/zapiliseve.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/1/0429/0933/5715/files/pojonijogez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9623/4400/files/behavioral_activation_worksheet_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8035/1897/files/54805281490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/azo_dye_synthesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8363/5619/files/23552748897.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0225/6795/files/8838908380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/letter_format_po_box.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/55038874699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/0160/5278/files/labewodowavesomifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/77891213199.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 1

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_off0000562a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x562A 5028 bytes
SHA-256: 4510025de936404e405b8875868dd7017985c64b12076e4903cf4f085e34ee91
font_01_sfnt_off0000673c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673C 10264 bytes
SHA-256: e5670a8ffde73b011246422a3baee0d878c2303a00137262b2468ef4b67eb12e

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