Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1d59ec79ef58da…

MALICIOUS

PDF

39.8 KB Created: 2020-08-01 02:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3caab91428b98b144f8638a8e049cd72 SHA-1: 691b93a204832ab9fd40057bf8340df16dda807f SHA-256: bf1d59ec79ef58daa899fd6ff18714bb0e03f5ba7f8912c9bfd357ec5f161373
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF link farm'. One of these links, 'https://ttraff.com/pify?keyword=unwell+matchbox+20', points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous other PDF links hosted on various domains, including Shopify, indicates a strategy to obscure the malicious destination and potentially leverage benign-looking domains for distribution.

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.com/pify?keyword=unwell+matchbox+20
    • http://files.redhillcommunityassociation.com/uploads/1/3/2/6/132682327/masodabaxo.pdf
    • http://files.greenwolfverticalfarm.com/uploads/1/3/1/3/131383719/3f0af7c6fe8.pdf
    • http://files.theroanokerestaurant.com/uploads/1/3/1/3/131380445/padami.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/zezopixonow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54101174921.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/natajiweserovaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5690/6918/files/rategoxupumibazufe.pdf
    • https://cdn.shopify.com/s/files/1/0439/2937/0779/files/18864310602.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1362/files/77285405873.pdf
    • https://cdn.shopify.com/s/files/1/0432/7204/4697/files/kasonikokif.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/95246381355.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3203/files/63310539831.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/49687919428.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/gewirezidasamekidoros.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/96416258119.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_off00005da7.bin
c202f188161249cdb3bb5d36cc7b9dc6011db0ab39f61e258d787b2f69f41c72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA7 5332 bytes
font_01_sfnt_off00006fbe.bin
8a9d48615b8c5d3e21416ae3bdf4b0aea19599483f3067885e278af23b2ca10c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBE 10168 bytes

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