Malicious PDF — malware analysis report

Static analysis result for SHA-256 24bfce0388d581d7…

MALICIOUS

PDF

43.6 KB Created: 2020-08-16 13:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48a9e908188f2f5a5fb10438d5fc8e0e SHA-1: 2f3da3a8965f97b08c37cd122a4bff842aea0be4 SHA-256: 24bfce0388d581d771799634764ce3420b3818743c680f0713962f467b19b95a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=hse+accident+reporting+statistics'. This suggests the document is designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to the same malicious URL and other URLs hosted on Shopify, indicating a link farm strategy.

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=hse+accident+reporting+statistics
    • http://wimutido.mercedesclubindia.com/uploads/1/3/1/3/131379730/e760c275e1.pdf
    • http://puzabo.astarthor.com/uploads/1/3/1/3/131383483/nuvinuferejerew.pdf
    • http://files.bellydancerusa.net/uploads/1/3/2/6/132681479/ribov.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9583/files/86013377523.pdf
    • https://cdn.shopify.com/s/files/1/0435/6128/7839/files/wemamiza.pdf
    • https://cdn.shopify.com/s/files/1/0432/7401/0782/files/bujibezajotorume.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/92217698937.pdf
    • https://cdn.shopify.com/s/files/1/0429/8768/4003/files/23854420622.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/lajonorulopajusutukob.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/30821326445.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7174/files/rosimumovepelaneka.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058a4.bin
1b31828bb0b0d289ae1beaa323382ea6ff99bbc10fac2d2378e2f514786e10eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A4 4956 bytes
font_01_sfnt_off0000697a.bin
6b168622b148538b369b25c979be95b460419be92957d4939a71484fc99170b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697A 13412 bytes
font_02_sfnt_off000093a9.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93A9 4324 bytes

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