Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f5d2631969474b…

MALICIOUS

PDF

43.3 KB Created: 2020-09-16 23:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc7a673e06cbbcc9e3115ecb861796cc SHA-1: aad3104f37ce54b2cd4649a5669f66c9a502768f SHA-256: 91f5d2631969474b952e805220fbd03f66269376dbee27ba07c0c06b634f52b0
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, which is likely used to obscure the final destination of the malicious content. The document body, though heavily obfuscated, contains the same keyword and URL, suggesting a lure to a phishing or malware distribution site. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=mitsushiba+golf+clubs+womens
    • https://4a06f5c3-5296-4197-9e80-5d72935848db.filesusr.com/ugd/938c70_032f713ed1ec4f65a7998112a6dc6138.pdf?index=true
    • https://f16a8c83-1d91-49ea-b8b9-6ba59168e2f0.filesusr.com/ugd/bdc04d_f83101298f51476ca2176722b4e4729c.pdf?index=true
    • https://6d70f03d-0cc2-4fcd-8b94-d48044c97b31.filesusr.com/ugd/d7d6cd_2037b32789b248498d9d07da97755718.pdf?index=true
    • https://02bfaa72-6714-4ef9-85ca-f6873058c3e0.filesusr.com/ugd/f2ef67_87dcd4274a1244709f8c63cddf97ed4d.pdf?index=true
    • https://70fe03ef-9063-4e89-9824-381fb034ff89.filesusr.com/ugd/2f7489_14fd3394d5614e04937ab7a5eeaee114.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0438/5944/3862/files/kuzibanulaxawa.pdf
    • https://cdn.shopify.com/s/files/1/0457/0162/8060/files/migakaxejo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0764/6630/files/nafogawun.pdf
    • https://cdn.shopify.com/s/files/1/0437/0530/3190/files/59895917879.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/weather_report_of_kolkata_west_bengal.pdf
    • https://cdn.shopify.com/s/files/1/0462/6884/2146/files/glencoe_algebra_2_chapter_2_answer_key.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_off00006ace.bin
ada8c6cc58982aa312e3a80989f7e132f75902bea6804d9c9630ce222506fab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACE 5436 bytes
font_01_sfnt_off00007d4c.bin
7e369dbf72df75cd32379c18ada58a82864d5bba80e2ea786e30811c313d715a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4C 10288 bytes

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