Malicious PDF — malware analysis report

Static analysis result for SHA-256 a80f646f5e5cf51c…

MALICIOUS

PDF

43.0 KB Created: 2020-08-17 02:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f14391ea1ddb62b21b04fcaaba32ecef SHA-1: 41b7cd2065bd49d3da362c3780769aaa6433c2c6 SHA-256: a80f646f5e5cf51c36daf9bb0cb00253b43ae59686858b5b81ebe7fd7f63aeac
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document body, though partially corrupted, contains the phrase 'Preparing pro forma financial statements' and a URL that aligns with the redirector. The ML classifier strongly indicated maliciousness, and the PDF structure itself suggests a link farm designed to distribute traffic to potentially harmful sites.

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=preparing+pro+forma+financial+statements In PDF document text
    • http://files.tmsapvo.com/uploads/1/3/1/3/131378950/pivojetexekigon.pdfIn PDF document text
    • http://kovubuf.californiacalisthenics.com/uploads/1/3/1/4/131437308/ed4fe6faf7efe2e.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/1/0433/1572/4456/files/pisosorigolurowifadom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/83192026451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0735/0696/files/91157794733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7818/0257/files/54121365618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5793/8581/files/jogizukifapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5975/6708/files/tidisuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/xafugak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/mofupuxom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2855/3634/files/7235563099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5382/5704/files/dalosujiremu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/32877371503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2522/6133/files/zijadenageg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/59880551436.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 5

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_off00006a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5F 5336 bytes
SHA-256: 4aefa1b8394ded57dc3668acbe71a8dbfe43d63f975c486919452b97c6aaa2a6
font_01_sfnt_off00007c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C68 9956 bytes
SHA-256: 872cf429efed3dde6f8b7fef3d99da0d979756f4dbd76b7da82ccaf1f3fb5d14

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