Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe04dc52fc9ca20b…

MALICIOUS

PDF

35.2 KB Created: 2020-08-14 07:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d7cfdd3a3aed8c9025d134bcc4c7e31 SHA-1: d3ab53ff0cc7bf56421895c82416d058f8e3422c SHA-256: fe04dc52fc9ca20b9d8a845e4d031e812699077f5e6694462f5213b4a8b434eb
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating these links point to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The presence of a link to 'ttraff.cc' suggests a redirection to a phishing or scam page. No scripts were extracted, but the sheer volume of links and the redirector usage are strong indicators of a malicious intent, likely a link farm for SEO-based phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=bakery+shop+game
    • http://files.barngoddesspahrump.store/uploads/1/3/2/6/132681931/veledexajufukur_zolod.pdf
    • http://files.rufiosrumblings.com/uploads/1/3/0/7/130738641/fanekadarub_tudofun.pdf
    • http://lifujeme.buddhismhotline.com/uploads/1/3/0/9/130969045/dogozikiru-kagodes.pdf
    • http://noxuxenuw.authorkirstyferguson.com/uploads/1/3/0/9/130969742/sutavo-refitaduwikalal-luzibijoluwe-woxeniv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/sajezixow.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/tusulipido.pdf
    • https://cdn.shopify.com/s/files/1/0433/5540/6494/files/74859059585.pdf
    • https://cdn.shopify.com/s/files/1/0434/7202/7814/files/how_to_unencrypt.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/nusujajobupajowumo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/26941528698.pdf
    • https://cdn.shopify.com/s/files/1/0434/0885/1098/files/93546217335.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0021/files/vuvunejipodibefona.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2536/files/reset_echo_dot.pdf
    • https://cdn.shopify.com/s/files/1/0431/0722/1661/files/76810020933.pdf
    • https://cdn.shopify.com/s/files/1/0441/2869/8520/files/puvajodojavedidoxixij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.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_off00004c32.bin
d05ba20f42fbf628fd6acc453fc1572bba135c75f48e439c5d554cca5717eb45
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C32 5416 bytes
font_01_sfnt_off00005e8c.bin
4af3e392c0f8950993d178af2d0a832a7fc1a3a6c6f50d573ee160bcb4adf80a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8C 9836 bytes