Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8f31dbd32e0b0ac…

MALICIOUS

PDF

36.8 KB Created: 2020-07-31 22:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ca12e6313bec44e919c8bec82f5a11d SHA-1: a63a3e6b69fb4edba02f8425bcd27d44ac8d14cc SHA-256: c8f31dbd32e0b0ac62b370187f261b789399be26a5fa107e4f56b978e0103336
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/wb?keyword=intelligent%20solar%20charge%20controller%20user%20manual'. The document body, though partially corrupted, contains text related to a solar charge controller manual, suggesting a lure. The presence of multiple Shopify links, while some are benign, contributes to the link farm characteristic.

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=intelligent%20solar%20charge%20controller%20user%20manual In PDF document text
    • http://files.sweettearestaurant.com/uploads/1/3/0/9/130969798/tiregu-dazutobewezir.pdfIn PDF document text
    • http://files.chestervt.gov/uploads/1/3/0/7/130738562/f1ca2849c636.pdfIn PDF document text
    • http://files.288sportsottawa.com/uploads/1/3/0/8/130814682/dugatazinarilik-bedagewisu-dogudesufeje-nirevolafe.pdfIn PDF document text
    • http://files.kickstart-hr.com/uploads/1/3/0/8/130814176/bepejusorido.pdfIn PDF document text
    • http://files.medicalimagingindia.com/uploads/1/3/0/7/130776152/6563714.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/1/0430/9227/9445/files/15231251257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/84592063667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5126/1853/files/fugisolusozikosesasokit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71409998288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/68061420764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7102/8896/files/xusawej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/80399405452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/46511397736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/fejer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3658/0757/files/46224883426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2127/9137/files/sinevuzuwuvilovoribeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/munuregadojibot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/lumivakoxi.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_off00004e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E1E 5152 bytes
SHA-256: 1737624550226df259d7f97306261e0a3c77ed9ddbed9a87a66d6d64df751f6d
font_01_sfnt_off00005f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7E 11748 bytes
SHA-256: bde64350d19b0f97fc55a325481005364907470f141a023f0b5a643dd09612c9

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