Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a1da6b88894f387…

MALICIOUS

PDF

51.5 KB Created: 2020-09-10 05:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0097f57eb611b8f0ad410ed2ba1e0b67 SHA-1: 6f7401838a242f1da1b73ca7c4894ffc1d13e7df SHA-256: 4a1da6b88894f387b53e252cfb9a80d6684d62df4c45203393b8ec6c361ed2b1
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=caer+en+tentacion+full+movie'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous links to external PDFs, some hosted on cdn.shopify.com, indicates a link farm strategy, likely to obscure the malicious destination or improve SEO for malicious content. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=caer+en+tentacion+full+movie
    • https://static.usrfiles.com/ugd/bb13a2_e88f87b1a19448439e27cf0fa5121589.pdf
    • https://static.usrfiles.com/ugd/4bb103_4907697cce0149cc8e9fbf0e34079c49.pdf
    • https://static.usrfiles.com/ugd/bf57b5_1fc718e55bc0470c90a0e89bb1b0507e.pdf
    • https://static.usrfiles.com/ugd/4cf28d_695d11b7035e44a1b30b2ca41a6e2ed7.pdf
    • https://cdn.shopify.com/s/files/1/0434/3965/3030/files/genogram_template_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/birevojoxujimal.pdf
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/how_to_install_kali_linux_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/1929/5131/files/activated_sludge_process_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0469/0205/0978/files/14147330956.pdf
    • https://cdn.shopify.com/s/files/1/0448/0778/2557/files/soburuvalega.pdf
    • https://cdn.shopify.com/s/files/1/0434/4109/4817/files/yadav_brand_song_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0434/3237/8517/files/comparative_and_superlative_adjectives_and_adverbs.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7148/files/fusetuxan.pdf
    • https://cdn.shopify.com/s/files/1/0436/9969/9866/files/vemevetagajuvelififodivu.pdf
    • https://cdn.shopify.com/s/files/1/0463/9916/0475/files/83321761657.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/
    • https://cdn.shopify.com/s/files/1/0434/3965/3030/files/genogram_template_thera

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008458.bin
f33771845c38865473d5db6f85f914101b4082e80717e551abbc99f91881b04c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8458 4816 bytes
font_01_sfnt_off000094ac.bin
3aabaa867606a7a834bb2e8cfaa9070bd92bf0fbc383dba932d1e6d73a582d05
pdf-font-stream PDF embedded font (sfnt) at offset 0x94AC 14228 bytes