Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6bc49273b06a39a…

MALICIOUS

PDF

42.1 KB Created: 2020-08-29 09:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b94c00b6e9a8ac1bbcebaa4ec5caf879 SHA-1: 4308e6e4aa34a821dc532a1cd724f962f09831ae SHA-256: a6bc49273b06a39ac55eeac6ff61a242a0bcca55df52de5518d177c7ebd554a1
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, likely to improve search engine ranking and distribute malicious content. No scripts were extracted, and the family is undetermined.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=personality+adjectives+that+start+with+n
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/tatalaksana_keratosis_seboroik.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9186/files/vopuduburebuvimib.pdf
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/20614111566.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6918/files/nba2k13_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6033/8586/files/bebos.pdf
    • https://static.usrfiles.com/ugd/b8c837_85a02cd4e13f44c7a75ca7189ebe6650.pdf
    • https://static.usrfiles.com/ugd/b8c837_b49899ea6ce24531be5abbcbe765ce65.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6422/0055/files/invitation_card_template_photoshop.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/31888226179.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/cisa_review_manual_2016_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/xediwojorunagurojedizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/31592970522.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_off00006481.bin
33a7529e5e8d32cb49f58e11a25b3790977525f1723b49b6e5dac446e361fa37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6481 5356 bytes
font_01_sfnt_off000076c6.bin
b83152cee11b68510c34147b92347615cc06caab46587eba54412b39ac88c652		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C6 11512 bytes

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