Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e86503d4e101c5c…

MALICIOUS

PDF

41.7 KB Created: 2020-08-13 22:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6aa3d744209b754606d749fa198f98a SHA-1: e4196168ca100ab10749a2265e4d12dcdf705d55 SHA-256: 7e86503d4e101c5ceb2ae5ea24bd52e6081df572ec87e0d4e02565ef8a566d66
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 'https://ttraff.com/pify?keyword=expense+list+template+pdf'. This URL is presented within the document body, suggesting a lure to trick users into believing it is an expense list template. The file also contains a large number of embedded links, many pointing to Shopify, which is flagged as a link farm. No scripts were extracted, and the document body is heavily obfuscated, but the primary intent appears to be redirection to malicious infrastructure.

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/pify?keyword=expense+list+template+pdf
    • http://files.sockfetishsocks.com/uploads/1/3/1/3/131380120/totepesuna_nijojatizo_zoleloxakepob.pdf
    • http://kusosibax.somethingblueplannings.com/uploads/1/3/1/4/131407668/zadibudopavejel.pdf
    • http://files.worthvillepreservationgroup.com/uploads/1/3/1/8/131856815/4243513.pdf
    • http://files.hopelee.ca/uploads/1/3/1/3/131383318/xixitosabowazor_nezigugak.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1407/files/55325404625.pdf
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/d_d_4e_races_and_classes.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/zokobatudukipogozod.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/play_warcraft_2_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/99139409348.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/kanipenadakimix.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/12711396810.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7654/files/le_journal_el_watan_d_aujourd_hui_en.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/lovamibunobunalof.pdf
    • https://cdn.shopify.com/s/files/1/0430/0642/7299/files/72284348787.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_off00005b6a.bin
4c221b9626c411f4395ab8ec0e0bd8b01da8544ed64d10e53024cba3f2d4dab4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6A 4792 bytes
font_01_sfnt_off00006b94.bin
72df6a1d3c050ccfd8abbe7246a6a8849cfa77c89428ecd85dc07593605d8fbf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B94 9568 bytes
font_02_sfnt_off00008c15.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C15 4324 bytes