Malicious PDF — malware analysis report

Static analysis result for SHA-256 368e4182f8cd82c6…

MALICIOUS

PDF

37.3 KB Created: 2020-09-03 14:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7091fd856152c75fe4db4a53bc12242d SHA-1: 3eaeb09d5843c80bb73544758cb87fc0be0f48ee SHA-256: 368e4182f8cd82c61848ae389536f904fea79ebfcd816940684ad97e8f62ec6c
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to a URL that includes 'butterfly knife template csgo'. This suggests a social engineering lure to entice users to click the link. The document body, though heavily corrupted, contains a similar string and the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign content but serve to obscure the malicious redirector.

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.club/wix?keyword=butterfly+knife+template+csgo
    • https://static.usrfiles.com/ugd/d01287_3d416ecfd61f408bb0a67b9a7086c39b.pdf
    • https://static.usrfiles.com/ugd/87a178_588c754a83ae4ee3b299015dd32591a4.pdf
    • https://static.usrfiles.com/ugd/77941b_1f61137e650f46c5ac474e2d28961799.pdf
    • https://static.usrfiles.com/ugd/f3cb45_2a853b3249de47e9b3850a71e3074988.pdf
    • https://static.usrfiles.com/ugd/c0fca2_81a45e862bcf4dc38f070e4c72afdfd9.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/xerez.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4861/files/nujarobo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/34558037311.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8072/files/bezekupakonexek.pdf
    • https://cdn.shopify.com/s/files/1/0433/7539/4979/files/31142062203.pdf
    • https://static.usrfiles.com/ugd/9a242c_ffec6b39465b4d79bca2a7b6fa8f19e1.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_cb5ccbca68df472489b322ab6a335f1f.pdf
    • https://static.usrfiles.com/ugd/70c1f8_2278b19d882342d780218beff172b631.pdf
    • https://static.usrfiles.com/ugd/45e30f_ac28b4f7051d4e2c84fd90a49e562bd8.pdf
    • https://static.usrfiles.com/ugd/87d215_72c3ff5f96934690b9bd6a754c20aa11.pdf
    • https://static.usrfiles.com/ugd/6c032c_0aa753cb04e540aead759229737113d4.pdf
    • https://static.usrfiles.com/ugd/9ec29b_bc676314926545758630c4941ecdadc9.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_off0000531b.bin
2b121792c246096d7023da4b81bedc2c3562b77972651e6127763440267f120a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x531B 5548 bytes
font_01_sfnt_off000065f5.bin
1e2b0322005648d41d8e70d09c8ad192c0ee1e847825a0c4335db65f3bb39b66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F5 10052 bytes

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