Malicious PDF — malware analysis report

Static analysis result for SHA-256 d85028f1d416a727…

MALICIOUS

PDF

50.4 KB Created: 2020-08-30 10:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 557e72fcda2411ac4b7a7e445e4249ef SHA-1: 813e23f4b86168bfb7e158b5b918f653ba8c336e SHA-256: d85028f1d416a727fb450ae69227bcbadcbd6754647cc2b7edea61eac1248f00
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'Sherlock Holmes short stories' and the URL itself, suggesting a lure to a malicious site. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a PDF link farm. No scripts were extracted from this sample.

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.cc/wix?keyword=sherlock+holmes+short+stories+level
    • https://cdn.shopify.com/s/files/1/0432/8525/0216/files/maplestory_flames_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/78991623643.pdf
    • https://cdn.shopify.com/s/files/1/0430/0963/8553/files/talikusepelipebetoja.pdf
    • https://cdn.shopify.com/s/files/1/0446/7264/7331/files/investor_pitch_deck_powerpoint_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/20068305897.pdf
    • https://cdn.shopify.com/s/files/1/0449/9108/6750/files/install_retroarch_on_raspbian.pdf
    • https://cdn.shopify.com/s/files/1/0435/3002/7157/files/el_materialismo_dialectico.pdf
    • https://cdn.shopify.com/s/files/1/0427/8393/2582/files/94942006269.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7599/files/nosavu.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fc892b3cb714e0c94ce61acef817458.pdf
    • https://static.usrfiles.com/ugd/b8c837_57ede5627bd64971b4976289694babe6.pdf
    • https://static.usrfiles.com/ugd/b85eb0_73d54b2279234704b412c5bec268242b.pdf
    • https://static.usrfiles.com/ugd/b8c837_7af8bd65cb784c87af0e8e52cf512c72.pdf
    • https://static.usrfiles.com/ugd/078c79_2adfa4841a4a4e62ac8d6a44a44bca7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_31e17141cec84f3680680dc50bba2ba8.pdf
    • https://static.usrfiles.com/ugd/ea78e0_d958d02a8fca46669dd7f5f94c132512.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_off000087ad.bin
91d82a8b0d3d83c8b74c9a2f78af4c82a88f00d7f3b1f15b2ce6bb68f58b6bd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87AD 5056 bytes
font_01_sfnt_off000098c0.bin
968a70062c642d5aa22307e7f56cd3bb519064a98291034dd1be49d4d5ad849b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98C0 10612 bytes

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