Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7563b83016b1fb4…

MALICIOUS

PDF

40.3 KB Created: 2020-08-04 08:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ef1ffab11464b0177d899c89d815e4f SHA-1: c8b5dc57a8fc32da4a9d7c218b34ae4bcad5fe03 SHA-256: d7563b83016b1fb4cb53d4c2b46499af6297fbfd79fc63e371644e0b042f9bb7
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=cartea+amantele+trecutului+pdf'. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links. The presence of a large number of links suggests an attempt to distribute malicious content or phish users.

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/pify?keyword=cartea+amantele+trecutului+pdf
    • http://files.estellessweetitchblankets.com/uploads/1/3/1/4/131409170/tixavaxanepuluxuvit.pdf
    • http://files.gonecruisincarclub.com/uploads/1/3/2/6/132682627/4512883.pdf
    • http://files.maudetrickerprints.com/uploads/1/3/1/1/131164046/xatanizunevi.pdf
    • http://files.yoursecondopinionllc.com/uploads/1/3/0/7/130740033/kojorevi_niriwegare_regedirosowaju_mebipu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/80917137353.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/wosisozewi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/39764440216.pdf
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/litawugezoxozawagor.pdf
    • https://cdn.shopify.com/s/files/1/0436/0264/1059/files/13989462721.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/dozozezeduxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8077/files/56369456449.pdf
    • https://cdn.shopify.com/s/files/1/0434/7140/5222/files/35102227092.pdf
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/9279417553.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2712/files/32017448020.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/46830415610.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_off00005f34.bin
1b03a6dcead39ce2e762fa79b7cffc833c9c6301c8f13f1695b64ad3d7891536		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F34 5028 bytes
font_01_sfnt_off00007037.bin
9ae9bd3a887e60fb70e747be968d600c66b4f2ac015d774968a5c58fad130da1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7037 10800 bytes

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