Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71cc9ab7a067209…

MALICIOUS

PDF

37.1 KB Created: 2020-08-09 14:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e143fecd8c618e6be828d8b26f6dc1f3 SHA-1: 88c5d3409a3d0e35a103ead95ed756f95cdd2bc2 SHA-256: c71cc9ab7a067209e3b3668618899aee36aaaba0ca50c876bd53f4a8612a56e9
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users into downloading further malicious content. The document body also contains numerous links to external PDFs hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content. The presence of a 'download button' lure further supports the malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=fundamentals+of+accounting+principles+20th+edition+pdf+download
    • http://novosefas.roncyrefugeerelief.org/uploads/1/3/0/7/130739704/7220708.pdf
    • http://files.bernadettemccormack.com/uploads/1/3/0/8/130874163/fafofamagopi.pdf
    • http://sifega.levinoguess.com/uploads/1/3/1/4/131453540/fusiwotisusebagimira.pdf
    • http://files.tastingtheheat.com/uploads/1/3/0/7/130776714/tudaluvelokido.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30899714004.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rewosegukedisupagur.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/zomenivako.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25322908130.pdf
    • https://cdn.shopify.com/s/files/1/0440/6598/0581/files/38877706460.pdf
    • https://cdn.shopify.com/s/files/1/0440/9442/3192/files/44192297304.pdf
    • https://cdn.shopify.com/s/files/1/0437/0661/3912/files/pisitajegoju.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/50223925471.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7317/files/6439996435.pdf
    • https://cdn.shopify.com/s/files/1/0435/1849/2824/files/51968699016.pdf
    • https://cdn.shopify.com/s/files/1/0440/3416/2853/files/algebraic_fractions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0443/9392/2726/files/adobe_printer_queue_not_clearing.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_off00005010.bin
dae8ebbf61b12ad3e9ecc1d75e1d05d3c6bca9a5659a95d525ea91048a5ef7e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5010 5892 bytes
font_01_sfnt_off0000640a.bin
db4cfce16cbf04526dcb39599b62b1b6c4c4cf13bc8e97d80f584d41dd5561b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x640A 10256 bytes