Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae75f0225fa26f5…

MALICIOUS

PDF

42.0 KB Created: 2020-08-10 23:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54038c4476bab7c55b56a0eeb477e278 SHA-1: 4e4d9350ba8f6ec8299926bc55eefc120f060c8e SHA-256: 3ae75f0225fa26f5e3b3d9934af13409d074f7705b4ea86421b876f237f29f0f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=social%20support%20system%20worksheet'. This indicates a social engineering lure, attempting to trick users into clicking the link. The document body, though heavily obfuscated, contains the same URL and other URLs that appear to be part of a link farm, further supporting the malicious intent.

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/wb?keyword=social%20support%20system%20worksheet
    • http://files.artbylucymott.studio/uploads/1/3/0/8/130873872/ab769db3e.pdf
    • http://files.wauwatosabasketballclub.com/uploads/1/3/1/4/131437832/7636378.pdf
    • http://files.jamesleachfineart.com/uploads/1/3/0/7/130776743/babirijov.pdf
    • http://tolalida.simplybecause.shop/uploads/1/3/1/4/131406717/nogamomajitaro-zogeduf.pdf
    • http://jexuvuduw.baddogfarms.net/uploads/1/3/1/4/131438464/770f0.pdf
    • https://cdn.shopify.com/s/files/1/0431/7210/2301/files/toefl_test_preparation_kit.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/86458713059.pdf
    • https://cdn.shopify.com/s/files/1/0441/3220/4696/files/nematode_life_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/55442952561.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/xasitivos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39086675177.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/zafobejebamobakibajirega.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/31779115290.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9024/files/vasaluz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/lepik.pdf
    • https://cdn.shopify.com/s/files/1/0437/2214/5943/files/nujunojizudazurelidideru.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_off000065ab.bin
28bc83910567b3bac05f5d91d6341a62c4293557b08eaf4a6950128810ce54a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AB 5532 bytes
font_01_sfnt_off00007861.bin
6d00995462296bcf88436624d228671211536e8d22898475c8811abd5ed534dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7861 10192 bytes

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