Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6fbb8d08495c5f3…

MALICIOUS

PDF

43.1 KB Created: 2020-08-15 09:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bcc836842c4514939d06eb004c88a79 SHA-1: 53399b86ad0df04e77d00e59495ff538362273d1 SHA-256: b6fbb8d08495c5f3320e14d4ec74a4dd729abfedac8c3ea76fa2fd4917b72ea7
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/wb?keyword=chemistry%20experiments%20for%20life%20science%20majors%204th%20edition%20pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to lure users to this malicious domain. The presence of many external PDF links further supports the SEO poisoning attack pattern.

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/wb?keyword=chemistry%20experiments%20for%20life%20science%20majors%204th%20edition%20pdf
    • http://files.rhetoricsoup.com/uploads/1/3/0/7/130738939/xaximulevuwedex.pdf
    • http://files.bowvalleyfreestyle.com/uploads/1/3/0/7/130740221/e9dbfb9ccbfb.pdf
    • http://files.rockymountainflydesign.com/uploads/1/3/1/8/131856433/rewojedifosof-mabononipikajin-nolevodab-zuredi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/autoplay_menu_builder_templates.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61051106257.pdf
    • https://cdn.shopify.com/s/files/1/0431/6872/7194/files/nuvazalokuxijedumitokesis.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/fangirl_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4679/files/acidosis_metabolica_refractaria_a_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1781/files/14837747727.pdf
    • https://cdn.shopify.com/s/files/1/0433/0985/8984/files/25865165259.pdf
    • https://cdn.shopify.com/s/files/1/0429/8299/8170/files/dusulinefotodanel.pdf
    • https://cdn.shopify.com/s/files/1/0437/2057/3080/files/crib_sheet_sets_target.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/kufavepizeduvuvus.pdf
    • https://cdn.shopify.com/s/files/1/0437/5448/7969/files/93_nissan_centra.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7221/files/.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a77.bin
6516298b89ae61827a071b3305509e6d4fb4b0ece275e3a5134d9c24ea83171f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A77 5540 bytes
font_01_sfnt_off00006d3c.bin
1dfe0e2f316454c8dbe4d3b8b8e77d5d23306a23873474805e6b050e87bfde5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3C 10520 bytes
font_02_sfnt_off000090f7.bin
781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60
pdf-font-stream PDF embedded font (sfnt) at offset 0x90F7 4324 bytes