Malicious PDF — malware analysis report

Static analysis result for SHA-256 81f0714740ca9b33…

MALICIOUS

PDF

42.0 KB Created: 2020-08-25 23:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03311e96715a46d3dbb543d2c12c5cf6 SHA-1: 2906ea983aa7cbbbf0338e284539a94ae662f19f SHA-256: 81f0714740ca9b33ea49bc73cdb588941a1d1b53eac54a343e02533008e11aa1
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The document also contains a large number of external links, many pointing to Shopify, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is https://ttraff.com/pify?keyword=ruby+tuesday+new+orleans+seafood, which is likely used to redirect the user to a malicious site. No scripts were extracted from this sample.

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.com/pify?keyword=ruby+tuesday+new+orleans+seafood
    • http://files.naturallynickelfree.com/uploads/1/3/0/8/130874012/gutivona-kejero-laxijubu.pdf
    • http://xorew.tohsthecenter.org/uploads/1/3/0/8/130873998/derepeweriki-jufovid-kasudizob-wevakinuboje.pdf
    • http://jefuk.jimfitzsimonsphotography.com/uploads/1/3/2/8/132815793/jefelinoridu.pdf
    • http://sazil.annapurnasriram.com/uploads/1/3/2/6/132682646/vumej.pdf
    • http://zexubata.fleenorfamilyadventure.com/uploads/1/3/1/4/131453501/xuponadarate.pdf
    • https://cdn.shopify.com/s/files/1/0439/2786/3464/files/love_stage_episode_1_eng_sub.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/rufuviwekubevifanofo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/8244715030.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3893/files/critical_thinking_books.pdf
    • https://cdn.shopify.com/s/files/1/0437/1152/9114/files/lewusozijuvilolip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5676/6869/files/jolemepifidowirapewulagit.pdf
    • https://cdn.shopify.com/s/files/1/0429/4246/4163/files/sikub.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/senetuxatuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0563/9836/files/82437376459.pdf
    • https://cdn.shopify.com/s/files/1/0434/6180/4198/files/gegutikezotetelaxoli.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/77451670633.pdf
    • https://cdn.shopify.com/s/files/1/0438/1714/0386/files/visual_boy_advance_roms.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050dc.bin
7cffe57ffe366d6479499ce30d60746bf6e656efe55e22d1edac7853b06c9fcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x50DC 5240 bytes
font_01_sfnt_off000062cf.bin
732e26ef29275c7146673c99c1288f967b33451a12e82a6007e2c6a825e72007
pdf-font-stream PDF embedded font (sfnt) at offset 0x62CF 10248 bytes
font_02_sfnt_off00008622.bin
74c40f4c9de6c7c77e92d90278be04d04ba19a5b7de7d81afa27d5744c1b30ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x8622 16096 bytes