Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa25c706f34b227a…

MALICIOUS

PDF

35.1 KB Created: 2020-08-11 19:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 65e1177e99d81088a44b23815f212c55 SHA-1: 14f14c1c3c509536517ad52d5cc1eebe9d595c99 SHA-256: aa25c706f34b227a42465f42e61f03964560dfffa88fb14b942bb244b7dc59e3
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/wb?keyword=carroll%20diagram%20worksheet%20ks1'. This suggests a phishing or social engineering attack aiming to redirect the user to malicious infrastructure. The document body, though heavily obfuscated, contains the same URL, reinforcing its role as a lure. The presence of many links to Shopify domains, while some are benign, indicates a link farm strategy to obscure the malicious destination.

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/wb?keyword=carroll%20diagram%20worksheet%20ks1 In PDF document text
    • http://dusiba.pastpatriot.com/uploads/1/3/1/6/131606490/7863677.pdfIn PDF document text
    • http://files.mscarreyslearninggateway.com/uploads/1/3/0/8/130815009/4329f41.pdfIn PDF document text
    • http://files.otakipotteryclub.org/uploads/1/3/0/8/130813357/1665960.pdfIn PDF document text
    • http://moside.massageandfacialorganics.com/uploads/1/3/2/6/132695535/30c1c3bb.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/1/0432/1263/6322/files/4404037539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/dumatidusuwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/sosogufafelamawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/96160199387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21659337375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/ffxiv_dark_knight_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9590/0828/files/degekepotoruvibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/bioassay_of_acth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0151/1068/files/affordable_housing_scheme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/ripid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/59838287994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4959/9644/files/printable_blank_monthly_calendar.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 2

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_off00004c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C79 5352 bytes
SHA-256: d84e5257c1227921ae0c26e86d15302d8f2f0294c82815e9f9e28d5fe3e44521
font_01_sfnt_off00005ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA2 9660 bytes
SHA-256: 39ce3bb44209b9baa4420860be16adc3fa9d644f0eeeb322d885f5dfd02edc5f

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