Malicious PDF — malware analysis report

Static analysis result for SHA-256 437fcfbc326d83dc…

MALICIOUS

PDF

47.6 KB Created: 2020-08-26 05:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 27d2eb45e248320d043a2609525942dd SHA-1: ad8ef5c4d3a64997452f8c6966e9d92892c0171f SHA-256: 437fcfbc326d83dc91d9bc3d7214aa57faa069d7408dcae47f5a6ded6b192fa0
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many pointing to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. One critical heuristic identified a link to a known malicious redirector at https://ttraff.ru/pify. The document body, though partially corrupted, contains text related to a "Brute lawn mower parts manual" and the redirector URL, suggesting a lure to trick users into clicking malicious links. No scripts were extracted from this sample.

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=brute+lawn+mower+parts+manual In PDF document text
    • http://files.pisaisall.com/uploads/1/3/2/3/132302999/mopowefov-mudosivevozafed.pdfIn PDF document text
    • http://tubud.jaseelectrical.com/uploads/1/3/1/4/131407424/172f2101bcaf93.pdfIn PDF document text
    • http://files.happyhikerruidoso.com/uploads/1/3/0/7/130774962/sunusiduvelisa-gewixozujojiru-xilewez.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/1/0430/3876/9303/files/apprendre_l_italien_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2028/8153/files/lebom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/jabutoxejeladazevasijaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0799/0169/files/1181381323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3531/8689/files/56561704660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4997/5961/files/english_worksheets_capital_letters_and_full_stops.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/kivekajav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2363/7399/files/android_room_update_multiple_columns.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/65557571898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/remejopubetofejon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5196/5855/files/vemezi.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_off00007cf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF4 5104 bytes
SHA-256: b1196cab9c5749c2577a19e0ee45ab7e5a2ee52d9606e98713eb8a1bc4c2fa96
font_01_sfnt_off00008e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E48 10184 bytes
SHA-256: c4fc38fbc4cd07c0b3296fab538881f64284bfe959c4990e85bbe083fbe94b44

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