Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fdb6fa2002dce98…

MALICIOUS

PDF

47.5 KB Created: 2020-08-22 00:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc235b494fc7040245c1275c7d074fe8 SHA-1: c040c21d73256ad078fdb2bcc0ed8b854aee8177 SHA-256: 1fdb6fa2002dce98775fec7d89d5d1afcd47c0cd7d09936b06d4d4f7f27ceab9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204.001 Malicious Link T1204.002 User Execution: Malicious File

The PDF document contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though partially corrupted, contains text suggesting it is a 'Linux command line cheat sheet pdf', which serves as a lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing attempts.

Heuristics 4

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=linux+command+line+cheat+sheet+pdf
    • http://files.shoptwoowls.com/uploads/1/3/0/8/130874220/gabarezi-kujopi.pdf
    • http://files.nationalstocktradingacademy.com/uploads/1/3/1/3/131383255/6054571.pdf
    • http://files.signcraftpdx.com/uploads/1/3/2/6/132696285/zujoxi.pdf
    • https://cheatography.com
    • https://cdn.shopify.com/s/files/1/0435/6128/7839/files/exercice_pour_apprendre_a_lire.pdf
    • https://cdn.shopify.com/s/files/1/0434/0845/7885/files/cotton_sheet_sets_at_walmart.pdf
    • https://cdn.shopify.com/s/files/1/0432/1683/0632/files/chemistry_of_polycyclic_aromatic_hydrocarbons.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/72008738633.pdf
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/85761180089.pdf
    • https://cdn.shopify.com/s/files/1/0434/3794/9090/files/72820252541.pdf
    • https://cdn.shopify.com/s/files/1/0438/6832/4005/files/wusuri.pdf
    • https://cdn.shopify.com/s/files/1/0433/5452/1758/files/constrictive_pericarditis_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3481/files/12910289150.pdf
    • https://cdn.shopify.com/s/files/1/0433/9512/1319/files/29992658563.pdf
    • https://cdn.shopify.com/s/files/1/0429/8162/1919/files/42813430603.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_off00006c30.bin
23f5e75009463594308dffd9cc331bd399f5cad64ca4733b2dff5e0a14f93ea6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C30 5308 bytes
font_01_sfnt_off00007e1d.bin
f0c376766b6830d2142ed9dfa00aba1723ddc368c64ca29fe4ceeec3c591c5cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1D 16320 bytes