Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1164fcebdf81e73…

MALICIOUS

PDF

48.7 KB Created: 2020-08-14 22:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81f534c79411fc1598de346025e31906 SHA-1: 070ae9ca7613ad5a310aa5eb06dac348ff252ec3 SHA-256: f1164fcebdf81e732b9d079765f759030066a06eb93989827b926dd445144acf
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=best+default+alarm+sound+android'. This suggests the document's purpose is to lure users to potentially harmful sites. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of the exact lure.

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/pify?keyword=best+default+alarm+sound+android
    • http://files.didistutter.org/uploads/1/3/2/7/132712015/33918117.pdf
    • http://files.oakhillsoregon.com/uploads/1/3/1/3/131378942/5083474.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/67991586332.pdf
    • https://cdn.shopify.com/s/files/1/0430/3106/8825/files/penndot_address_change.pdf
    • https://cdn.shopify.com/s/files/1/0441/1988/3928/files/wakojexixuziju.pdf
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/18506140706.pdf
    • https://cdn.shopify.com/s/files/1/0443/8127/4278/files/58430046111.pdf
    • https://cdn.shopify.com/s/files/1/0435/2334/2495/files/75454853949.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/85348703305.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/doveditowidas.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/nifipemabipunalor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/fluke_179_multimeter_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/4346060069.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/
    • https://cdn.shopify.com/s/files/1/0428/2135

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007421.bin
59ea2b1ecdd5174e4ea18208345db29b90a69236382fbb57b2d22110072fc817		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7421 4984 bytes
font_01_sfnt_off000084f1.bin
b1a74b846a513514b1dcb94bc4705897a645119c880bc3264d1babdee0dab692		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F1 10144 bytes
font_02_sfnt_off0000a7ad.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7AD 4324 bytes

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