Malicious PDF — malware analysis report

Static analysis result for SHA-256 39dc7897bf256a24…

MALICIOUS

PDF

112.1 KB Created: 2020-09-14 08:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 784ae7731f3ef6c9dee95ba8f041572e SHA-1: 11de3501d829d2447edd981babbc250a6d3efb7d SHA-256: 39dc7897bf256a248ef703658e40d8b98edac14d5f2eb095f4765b1ac78da0a0
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=goat+simulator+unblocked+3d'. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure for game-related content. The file also exhibits characteristics of a link farm, with numerous embedded links, many of which point to benign content but are likely used to mask the malicious redirector.

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/wix?keyword=goat+simulator+unblocked+3d
    • https://static.usrfiles.com/ugd/4cf28d_eb2074a6b42f4186a042429b3effe5a1.pdf
    • https://static.usrfiles.com/ugd/eb6c48_92434bc7ea40480dab16e83151132314.pdf
    • https://static.usrfiles.com/ugd/c5d40f_bd7e50f15e214a85942055f07285f60c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e013ddffe1141b6ae4e7d874a777881.pdf
    • https://static.usrfiles.com/ugd/8b4172_2f67f3fd862d412996331882943b443c.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/miwanorodogowedu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/bioenergetic_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/baduta.pdf
    • https://cdn.shopify.com/s/files/1/0463/7717/3147/files/85525102373.pdf
    • https://cdn.shopify.com/s/files/1/0439/4899/8811/files/toro_6._75_149cc_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/0679/4651/files/tixubaseno.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/89097473389.pdf
    • https://cdn.shopify.com/s/files/1/0432/5552/9640/files/3043098156.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/poxatodovu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/28679113933.pdf
    • https://cdn.shopify.com/s/files/1/0432/0906/4607/files/asia_cup_2020_cricket_time_table_download.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_off000171ad.bin
fa0ab21ad0170952debeba7897479b632ea5a339e90fdf71abeec0d9b9340ca7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x171AD 5484 bytes
font_01_sfnt_off0001843e.bin
5f1e1c31a8c7a611fb1ad5ac2f3fe0df4bd2cb391c14660463343c96019a913c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1843E 15216 bytes

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