Malicious PDF — malware analysis report

Static analysis result for SHA-256 a629bc55d1b4805f…

MALICIOUS

PDF

41.9 KB Created: 2020-08-22 05:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffd83a662d7724bd3d4933d10e3aa3a1 SHA-1: 64a7fd4358cdd1fe6f97b74fdbad6f88679d7fe3 SHA-256: a629bc55d1b4805f9a75b6966202d6110646c15ffc147244722fc5cbc5eb43e7
120 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, specifically pointing to 'https://ttraff.ru/pify?keyword=cisco+ironport+wsa+user+guide'. This URL is presented within the document body, disguised as a user guide, to entice clicks. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign Shopify links, likely used to mask the malicious redirector. No scripts were extracted, and the document body itself is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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.ru/pify?keyword=cisco+ironport+wsa+user+guide
    • http://dowepe.royalmarineser.com/uploads/1/3/2/6/132696067/73c939504ed6375.pdf
    • http://files.marchettetravel.com/uploads/1/3/1/8/131871687/wafekowalu.pdf
    • http://files.pccaz.org/uploads/1/3/2/7/132710632/7624838.pdf
    • http://files.higgybabyphotography.com/uploads/1/3/0/8/130814106/nuserawiwex.pdf
    • http://files.hccbillings.org/uploads/1/3/1/3/131398131/3896076.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0549/files/sample_letters_of_good_moral_character.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5868/files/biology_12_ncert_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gowavofopinesifaremoka.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/4633780977.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5907/files/31624132867.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/fabaja.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/63332803116.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/finibus_bonorum_et_malorum.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/pokemon_reborn_relationship_variables_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1855/0430/files/pisalugobokuko.pdf
    • https://cdn.shopify.com/s/files/1/0429/0212/6755/files/65654194019.pdf
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/antiemeticos_mecanismo_de_accion.pdf
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/39362253439.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/77645990402.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_off000064d6.bin
ad3b0ecead4064dd277fe3d3c70cfbd003dfd496db0db63c19a2837c04b3f8b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x64D6 5204 bytes
font_01_sfnt_off000076a1.bin
ebba6a913618c854752b1200f32c91cfe9a7701b88de5c5dbdec9f1eb87f54d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x76A1 10488 bytes