Malicious PDF — malware analysis report

Static analysis result for SHA-256 5892276248da4033…

MALICIOUS

PDF

42.4 KB Created: 2020-08-23 13:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aec62e4ff5b4348ff1684da67a38f1a0 SHA-1: a4563fc021c1fe607101811636c13853ad383744 SHA-256: 5892276248da4033b71989d07d2e1fcc832c426b8225f6b3ee457a037c401158
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=dhalsim+sfv+guide'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL and other PDF links, reinforcing the attack pattern of luring users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=dhalsim+sfv+guide
    • http://files.ldskits.com/uploads/1/3/0/7/130738852/1f21959566ba5.pdf
    • https://cdn.shopify.com/s/files/1/0429/9449/9743/files/2059640937.pdf
    • https://cdn.shopify.com/s/files/1/0437/9528/4130/files/xajonozukesari.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/40131655605.pdf
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/12485321755.pdf
    • https://cdn.shopify.com/s/files/1/0437/2358/7733/files/shroud_of_turin_photo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/lipid_oxidation_mechanism.pdf
    • https://cdn.shopify.com/s/files/1/0432/3701/5719/files/99592999398.pdf
    • https://cdn.shopify.com/s/files/1/0435/5611/0495/files/47768319.pdf
    • https://cdn.shopify.com/s/files/1/0435/7593/5134/files/bewinizuzasabukogubetipo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7313/2961/files/figiselezo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d2a.bin
f43500276112609ff0adf00df34f40e655f83a7d2c7455e2fd072352cb61acd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2A 5284 bytes
font_01_sfnt_off00006f0e.bin
81ff18d7aeeeed776a55d987e658a80e98d8255dec9e8acadbc4acbe441a6815		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0E 14916 bytes

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