Malicious PDF — malware analysis report

Static analysis result for SHA-256 9894009577311684…

MALICIOUS

PDF

74.6 KB Created: 2020-09-02 00:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad3c1c7b206716641e50c5e999b0d536 SHA-1: 33b3fbd4ddfc0889cd31ef996ea5f2b57aa66093 SHA-256: 9894009577311684d15b3e45f75c24317d3389560beca3bcad78d6833850cf57
150 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 'https://ttraff.ru/wix?keyword=catalogue+schneider+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The ML classifier also 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.ru/wix?keyword=catalogue+schneider+pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86187089948.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/14212116344.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6249/files/29594712334.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9518/files/dojonegewadujuna.pdf
    • https://cdn.shopify.com/s/files/1/0437/5789/5831/files/pawn_broker_bill_format.pdf
    • https://cdn.shopify.com/s/files/1/0428/8774/1599/files/disarun.pdf
    • https://cdn.shopify.com/s/files/1/0439/7708/0990/files/86267272807.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luzugojozawok.pdf
    • https://cdn.shopify.com/s/files/1/0440/1581/2766/files/80251972495.pdf
    • https://cdn.shopify.com/s/files/1/0430/7258/5881/files/80632542811.pdf
    • https://cdn.shopify.com/s/files/1/0434/6347/5352/files/96815748176.pdf
    • https://cdn.shopify.com/s/files/1/0434/3113/3340/files/42908519070.pdf
    • https://cdn.shopify.com/s/files/1/0429/5262/2236/files/geometry_eoc_practice_test_2.pdf
    • https://static.usrfiles.com/ugd/9dda13_0d016fe7979742eab5bb92fe1b44ec6a.pdf
    • https://static.usrfiles.com/ugd/6f53d7_24ca4938e6c346619ca21f52dc1d1231.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_off0000dad7.bin
622a9ddbd6e0ff108c4ce542129673fea2d3c47a0fec0c4b147b138c957d914e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD7 5320 bytes
font_01_sfnt_off0000ece6.bin
93947f495ac2025a4b6a3c6057e493fa0ae6a41c7f15de28220c4e548c8bc848		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECE6 16248 bytes

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