Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8df7129bc67d691…

MALICIOUS

PDF

40.0 KB Created: 2020-09-01 08:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c184f88258b6d8a7e252a1ded8d2c87 SHA-1: 40c809ae9237b8d15747bbfb173fcde7060f6964 SHA-256: d8df7129bc67d6915676aa1f90feb65e8695f51153aea93e464fb631d3121c05
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=cow+eye+dissection+guide'. This URL is embedded within the document body, disguised as a dissection guide, to entice users to click it. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify. The primary malicious IOC is the ttraff.com 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=cow+eye+dissection+guide
    • https://cdn.shopify.com/s/files/1/0440/6378/5112/files/poetic_devices_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/everstar_mpm_08cr_bb4_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6505/files/sekipovozigorezodetuwaren.pdf
    • https://cdn.shopify.com/s/files/1/0437/8502/7745/files/arihant_maths_algebra.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/18541031568.pdf
    • https://cdn.shopify.com/s/files/1/0430/7347/0618/files/5491629453.pdf
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/1498646608.pdf
    • https://cdn.shopify.com/s/files/1/0433/4567/4389/files/54073693317.pdf
    • https://cdn.shopify.com/s/files/1/0433/2106/5640/files/king_james_bible_study_guide.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec46b9046ca94cfe850ab314226bdc4f.pdf
    • https://static.usrfiles.com/ugd/b8c837_428cec0b543d4fd7a34cd88414831e33.pdf
    • https://static.usrfiles.com/ugd/b8c837_574a705aa07d4f799105fe34f2ab17ff.pdf
    • https://static.usrfiles.com/ugd/6cfc61_2dadd3f7d53f4659b3e67c54a8a409e3.pdf
    • https://static.usrfiles.com/ugd/0779a3_0bc34b9906fa4a33a16876cfcb1eee3a.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_off00005fbb.bin
beeea432b2c83d58e05a6a79756902ec3ffd4f20bfb19b2a8b7e5a63c0277ff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBB 4868 bytes
font_01_sfnt_off00007079.bin
6bb2a969f6694d4d48ed01ef2fba19ec34ef75465a2649afaae4cdcf829264e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7079 10520 bytes

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