Malicious PDF — malware analysis report

Static analysis result for SHA-256 d997fa6b4e5f7599…

MALICIOUS

PDF

36.8 KB Created: 2020-07-25 03:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91efdc3547d0607c311571f4a78c7f72 SHA-1: 720cf7eeca4054c774ae61816a238b8a8b39b960 SHA-256: d997fa6b4e5f7599e13d395b851ace471c6410173c84a348aa6630ab00fb2477
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, pointing to 'https://ttraff.cc/pify?keyword=attendance+management+program+zkteco+free'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0431/8455/4135/files/zodisoduviwo.pdf'. The document body is heavily obfuscated and unreadable, suggesting it is not intended for direct user consumption but rather to host malicious links.

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.cc/pify?keyword=attendance+management+program+zkteco+free
    • http://files.autismbuddies.org/uploads/1/3/0/9/130969327/rebowujumux-dexufedat-medopivisa-bogom.pdf
    • http://files.emotionallyfocussedeating.com/uploads/1/3/1/3/131381772/xaraxalujag_ledazowajoso.pdf
    • http://files.ezvietnamese.com/uploads/1/3/2/6/132695434/6886625.pdf
    • http://files.bryangatescfi.com/uploads/1/3/1/4/131406781/lujufi_tizefa_tidapu_sunazuzem.pdf
    • http://files.zakiahgobok.com/uploads/1/3/2/7/132712508/0c44cc8f8fc.pdf
    • http://files.bryangatescfi.com/uploads/1/3/1/4/131406781/lujufi_tizefa_tidapu_sunazuze
    • https://cdn.shopify.com/s/files/1/0431/8455/4135/files/zodisoduviwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/vapadigavazijedaposow.pdf
    • https://cdn.shopify.com/s/files/1/0434/7507/5225/files/gigiwome.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/files/43701272189.pdf
    • https://cdn.shopify.com/s/files/1/0431/4949/2384/files/xixebirotubepa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1175/8491/files/moxuvijonepogerito.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/mirunag.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/loxokosazer.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/sadivazifetifagosorot.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/niforujubodefemagopoli.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1320/files/45432801880.pdf
    • https://cdn.shopify.com/s/files/1/0431/6489/3344/files/guvivowuginigeguna.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_off00005663.bin
e1953bb29d671fdf1c6a66e0db7dc8561ff4173aac693c37551ab4d7c4515d3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5663 5108 bytes
font_01_sfnt_off000067ac.bin
ba60c68124d4191bf71d258dc1ebcf38b05e88fecd703a6a44b50c539b8218f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x67AC 8824 bytes