Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ee43400f51c0ad…

MALICIOUS

PDF

38.6 KB Created: 2020-08-12 00:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5dbb148d9ed37cac05f04ae26830f4ff SHA-1: 0a65837d60bd57ff72c75337679da92edba7f70e SHA-256: 41ee43400f51c0ad6acf4f028e5a62d8db5b6229cf9e91be8cb17df5434eafef
120 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 critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=bs+iso+45001+pdf'. This indicates the document's primary purpose is to redirect users to malicious sites. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, likely to improve search engine ranking for malicious content. No scripts were extracted from this sample, but the presence of the malicious redirector is sufficient evidence for the attack pattern.

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=bs+iso+45001+pdf
    • http://files.artifactscollectables.com/uploads/1/3/1/4/131453062/3cc24e.pdf
    • http://files.freshmans.org/uploads/1/3/1/8/131857626/58b06.pdf
    • http://files.thestorystudiohk.com/uploads/1/3/1/1/131163635/tixefe_pejetadoxap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25618010541.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/51138065453.pdf
    • https://cdn.shopify.com/s/files/1/0430/5371/1513/files/badinerie_clarinet.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/xevobaremafu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/juzegi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6334/4280/files/kavoxepisusosujabikopezir.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4391/files/4947493260.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/90954697564.pdf
    • https://cdn.shopify.com/s/files/1/0430/6187/0746/files/30082354235.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/iqhayiya_college_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/antenna_handbook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/julubivej.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7198/files/angeles_y_demonios_libro_descargar_gratis.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_off00005917.bin
b83cbed3d1873b69d871d7a1160a5b7aa32eec93b1b8e65231ea415e59b11337
pdf-font-stream PDF embedded font (sfnt) at offset 0x5917 5152 bytes
font_01_sfnt_off00006ac6.bin
eab7cf5f5302cadadbcd5fff167eb7095500c4ff8eb43f21783c830bc087192b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC6 10316 bytes