Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75888c20e4e7c31…

MALICIOUS

PDF

33.4 KB Created: 2020-08-28 09:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f76acdede84d5e7c719281157c2dc7d SHA-1: 05cef0dac95454b31e2c8c763675d6f09f4322f0 SHA-256: a75888c20e4e7c31429e119c070a8940da7d4b0b635d1b3285e0ca7b1e4895a1
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=135lc+manual+book'. Another critical heuristic identified a PDF link farm, with the primary link pointing to 'https://cdn.shopify.com/s/files/1/0433/8132/5978/files/16886504733.pdf'. The document body text, though heavily obfuscated, contains keywords like '135lc manual book' which, combined with the malicious redirector, suggests a lure for phishing or malware delivery.

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=135lc+manual+book
    • http://files.francescomptonlibrary.com/uploads/1/3/0/8/130813420/linemetana_jetitudoxururi_tabezevugife.pdf
    • https://cdn.shopify.com/s/files/1/0433/8132/5978/files/16886504733.pdf
    • https://cdn.shopify.com/s/files/1/0437/1149/6343/files/rumafexetulomuguzenab.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/togina.pdf
    • https://cdn.shopify.com/s/files/1/0439/2468/4955/files/adjective_ending_with_ed_and_ing_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0450/3640/4900/files/90659967735.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/gajitowi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3653/9045/files/android_studio_3._4_development_essentials_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/72753323154.pdf
    • https://cdn.shopify.com/s/files/1/0458/1448/1062/files/36845622401.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52945462890.pdf
    • https://cdn.shopify.com/s/files/1/0446/1549/9939/files/environmental_and_material_flow_cost_accounting_principles_and_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/aavesham_telugu_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/relobowozidujume.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/wunofekabefol.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_off00004478.bin
b4518a272ebfce1e39767edf270f012313f870e8a25740aee2d2a3ad95f576cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4478 5120 bytes
font_01_sfnt_off000055d6.bin
e7034784190e9fc785c653f5a415e2a1075104d5de0dcddc94e85ea4352a3b66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55D6 9808 bytes

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