Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aab8136bc1222c9…

MALICIOUS

PDF

64.7 KB Created: 2020-08-13 22:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6a4382a977a9bbe364cfb4d2a0d4c15 SHA-1: 184866047dfe9ae1507000e5de9d95189df4ccac SHA-256: 3aab8136bc1222c9eb933dfb6fa65ee77a72beaa85ab13f80794f985a53f4ea5
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=flies+and+lies+deckers+fishing+report'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0433/2394/9224/files/19828744943.pdf'. The document body, though heavily obfuscated, contains references to the fishing report lure and the malicious URL.

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=flies+and+lies+deckers+fishing+report
    • http://files.melodydye.com/uploads/1/3/1/4/131454286/04ac14fdc12.pdf
    • http://files.pastorjadeyi.net/uploads/1/3/1/3/131380308/sewejukaziv_zonab_dudeketalomegu.pdf
    • http://files.clubbingfraggles.com/uploads/1/3/2/6/132683000/zesewizegodulizabaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2394/9224/files/19828744943.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/90978474026.pdf
    • https://cdn.shopify.com/s/files/1/0440/3717/7494/files/xisazubinajopug.pdf
    • https://cdn.shopify.com/s/files/1/0437/6100/8791/files/jubasipogaxusire.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/50314654698.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/wajawovisoxetof.pdf
    • https://cdn.shopify.com/s/files/1/0437/8158/7093/files/79732484331.pdf
    • https://cdn.shopify.com/s/files/1/0438/9784/7976/files/ca_intermediate_new_syllabus_books.pdf
    • https://cdn.shopify.com/s/files/1/0444/0460/5094/files/aircraft_design_conceptual_approach.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.pdf
    • https://cdn.shopify.com/s/files/1/0432/3531/1784/files/pdf_adobe_reader_9_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/suzosugim.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_off0000be77.bin
d032d546c11d8abde357da4f5ba953bd543dd5b7fb652192beedc73b20234a9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE77 5436 bytes
font_01_sfnt_off0000d0e8.bin
c0fbcbd0fd863033a525321138eb95482761a50b0034bc61e5a7befe81f4ffff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E8 10788 bytes

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