Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4354158d4bef3b…

MALICIOUS

PDF

43.4 KB Created: 2020-08-20 09:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d0b47724ab7997021c23354837f0d47 SHA-1: 3e5234077a8d2507e45b0c3c9576ef0ddcebcf8a SHA-256: bb4354158d4bef3b667708929ab1da1bdd3b8910c63fb7a0fa585cd59a6b9fbc
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains this URL and references Google Sheets, suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=google+sheets+sum+between+sheets
    • http://files.tdsacanada.com/uploads/1/3/2/6/132681670/riridogunek.pdf
    • http://files.europeandeliriumassociation.org/uploads/1/3/2/8/132814305/vasibuzigifig-xumapo-gamibagu-bupan.pdf
    • http://files.hairandmakeupbydesire.com/uploads/1/3/0/7/130739693/bisutidok.pdf
    • http://vekirugew.greenhillspediatrictherapy.com/uploads/1/3/1/0/131070450/9263459.pdf
    • https://cdn.shopify.com/s/files/1/0440/6679/9766/files/mapobo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/wojegixosimanopukegizeva.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/nolejimepepesofepepufuzi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0889/1807/files/79881860859.pdf
    • https://cdn.shopify.com/s/files/1/0436/6296/6937/files/guwonojilakijo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8904/9238/files/10029637090.pdf
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/1122250705.pdf
    • https://cdn.shopify.com/s/files/1/0435/3264/8602/files/kejerutegab.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/merakirewav.pdf
    • https://cdn.shopify.com/s/files/1/0433/4977/0399/files/learn_latin_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/wejuwezotuxovoxiwula.pdf
    • https://cdn.shopify.com/s/files/1/0429/6222/3263/files/dell_poweredge_r730_owner_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5583/2471/files/sijapuzewafedozavolerumo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7746/files/15924815599.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_off00005fb9.bin
bf1b31027b5509db49dcb18ff38adf25bdb8a9569a54292e751bdd20f28fee22
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB9 4888 bytes
font_01_sfnt_off0000705b.bin
23deba6e8fe106f5338f941941358cae41610bdde4f3d154204bdb0a20734dc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x705B 10008 bytes
font_02_sfnt_off0000929b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x929B 4324 bytes