Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec2c5b5b67e86702…

MALICIOUS

PDF

42.0 KB Created: 2020-08-08 06:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2cffae130ba5c5b432b73c28b611c1d SHA-1: bc6d84238009b42961d75dbbcfb2c6df82abb0db SHA-256: ec2c5b5b67e867028d8e79bec3555307c2772b2708dcb4dba5a8c5f6215f8f6d
150 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 indicating a link to known malicious redirector infrastructure at ttraff.ru. The document body, though partially garbled, contains text related to a '1954 leica m3 instruction manual', suggesting a lure to disguise the malicious links. The ML classifier also strongly flagged this PDF as malicious. 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.ru/wb?keyword=1954%20leica%20m3%20instruction%20manual
    • http://xoloxado.ecorocca.com/uploads/1/3/1/6/131637316/telivudegutav.pdf
    • http://pajev.lamour-du-chocolat.com/uploads/1/3/1/4/131452883/d39015787a0481.pdf
    • http://files.intermountainregionpc.org/uploads/1/3/2/3/132303310/ludepu_rokevipipidaja_nejufagiva_funuwizapanat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rojifibopi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/taos_web_cameras.pdf
    • https://cdn.shopify.com/s/files/1/0449/8941/5583/files/annihilation_script.pdf
    • https://cdn.shopify.com/s/files/1/0437/5648/6807/files/bending_emt_conduit.pdf
    • https://cdn.shopify.com/s/files/1/0441/0900/4952/files/wotukiloxikot.pdf
    • https://cdn.shopify.com/s/files/1/0431/1308/7142/files/80116612643.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/66754586377.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/95390834613.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/84279695951.pdf
    • https://cdn.shopify.com/s/files/1/0429/5639/0551/files/negipebidaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9545/7946/files/ultimate_mortal_kombat_3_moves.pdf
    • https://cdn.shopify.com/s/files/1/0432/4989/3531/files/36102334367.pdf
    • https://cdn.shopify.com/s/files/1/0433/1801/8216/files/46699885245.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_off000061bb.bin
59e6ac6162cd9584d414f9a7ef733df69a8b26eeb751c2b1610b91f6ea922d3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61BB 5436 bytes
font_01_sfnt_off00007426.bin
2695f67496aa044aad6f9a0f51b7d27fc566b88d765c44d6d93849e2965051ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7426 11584 bytes

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