Malicious PDF — malware analysis report

Static analysis result for SHA-256 90715bd75e65d40c…

MALICIOUS

PDF

42.1 KB Created: 2020-09-01 05:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6ab0e03c2ba96456e2596cbe8495099 SHA-1: fa1791f414a35b1fa0e3bf72486fb129283a57e4 SHA-256: 90715bd75e65d40c6ef74148712a3b031a7e711225b54288d5cbe2d4aa3085bf
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links, with the primary one being the malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the same malicious URL, suggesting a lure to a phishing or malware distribution site.

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.com/wix?keyword=adi+lakshmi+purana+kannada+movie+songs
    • https://static.usrfiles.com/ugd/921909_909cce5031d44b36be4b7d9f2e1120c8.pdf
    • https://static.usrfiles.com/ugd/bf650e_3019d9fc76e7479b946ef144cfe62542.pdf
    • https://static.usrfiles.com/ugd/b8c837_91b65c4aed5c49e0b53f8eb71402cae4.pdf
    • https://cdn.shopify.com/s/files/1/0454/1772/6120/files/98955317729.pdf
    • https://cdn.shopify.com/s/files/1/0434/6288/5541/files/havoc_brothers_album_songs_free_video.pdf
    • https://cdn.shopify.com/s/files/1/0437/6051/7269/files/4680849024.pdf
    • https://cdn.shopify.com/s/files/1/0430/6416/4506/files/tukoxerajamodelimazuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1931/files/27576233444.pdf
    • https://cdn.shopify.com/s/files/1/0431/0410/8711/files/20896935860.pdf
    • https://cdn.shopify.com/s/files/1/0440/7292/7384/files/learn_korean_online.pdf
    • https://static.usrfiles.com/ugd/57c819_5933356b57084720a75b29d8b39d5005.pdf
    • https://static.usrfiles.com/ugd/b88e3d_05e2bd5ac7994eda9e9ceb1460f26a26.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_ba84cd3cb73d41d8b87f246d2ef1f036.pdf
    • https://static.usrfiles.com/ugd/b8c837_71baf34b07de4a609da323efc26e6da5.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_off000067aa.bin
06d0f77b58059a642f375d9422493136e7a379a2e0acab9cd523c730a29a24f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x67AA 5484 bytes
font_01_sfnt_off00007a2f.bin
61c80f1ea0aa1fa4bcedc556259fd2a0c37410baeacf6c61f47d91810241270c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2F 9628 bytes