Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d99717b946e291…

MALICIOUS

PDF

45.0 KB Created: 2020-08-02 05:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9ecfca6974e93dc199df5e7b441ecf85 SHA-1: 579caadaa8412f4061c75405f72c74301a360402 SHA-256: c8d99717b946e29155821548943d2be8df0ca548ee2c4c63be0f05b945eaaf1b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with multiple URLs pointing to Shopify-hosted PDFs. One critical heuristic indicates a malicious redirector link to 'ttraff.ru', which is likely the primary malicious destination. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector and the link farm structure strongly suggest a phishing or SEO poisoning attack.

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=robinair+34288+problems In PDF document text
    • http://files.wakelandcolorguard.org/uploads/1/3/1/4/131437029/gikuz.pdfIn PDF document text
    • http://files.downrivermortgageone.com/uploads/1/3/0/7/130739697/3acc0769f521.pdfIn PDF document text
    • http://files.ebpnj.com/uploads/1/3/1/6/131606169/4131062.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/1/0432/8236/6629/files/38532693062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gejazopemovaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/nezawuxitag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/648189685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/rovivowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7929/4358/files/42302206004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/robin_hood_api.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/lutotixitanifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7789/2251/files/denejezizawefepasirivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2299/2028/files/zesowotekaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/damojezijenepibogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5841/2185/files/autohotkey_caps_lock.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3279/7607/files/gazopeziranonugupidu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E46 5688 bytes
SHA-256: 0b6dd70329e887b86b7ba3e8d8082eb0fd332173e1b25514b5f922ea06a52196
font_01_sfnt_off00006194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6194 14932 bytes
SHA-256: 412ad94f79c57f10be73f083b1acd75cad7316f0c4a6d15c8f54f57e5cf0c48e
font_02_sfnt_off00009003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9003 16120 bytes
SHA-256: 88439519992b54a76c49e1773b2988ac0eb869403dfb9e9ab63ea25f7580dedb