Malicious PDF — malware analysis report

Static analysis result for SHA-256 b575e7c46c94e38a…

MALICIOUS

PDF

36.5 KB Created: 2020-08-18 18:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61c87cb64d787a3782e4bd2064581919 SHA-1: fca7b30ff1b49aad9ce9d707e7cca81a6e3cbf8b SHA-256: b575e7c46c94e38a5f6a6a21975196c25bd6773541ea4f7dad49a372b21f91cc
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the URL and appears to be a lure related to a 'Bailiwick crossword answer'. The PDF also exhibits characteristics of a link farm, with numerous embedded links to other PDF files, many hosted on Shopify. This suggests a campaign focused on driving traffic through redirectors and potentially hosting further malicious content on seemingly benign platforms.

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.com/pify?keyword=bailiwick+crossword+answer
    • http://ledolu.trofefashion.com/uploads/1/3/2/7/132740718/wozenizadu.pdf
    • http://tekowo.empoweringdesign.net/uploads/1/3/1/4/131406082/33a9fab72d.pdf
    • http://files.orderaugies.com/uploads/1/3/0/8/130814492/4012322.pdf
    • http://files.thejadetemple.com/uploads/1/3/0/7/130775448/masev-kabozokaxopapov-xaxemedog.pdf
    • https://cdn.shopify.com/s/files/1/0429/5720/9753/files/dolepurunomufejuroxad.pdf
    • https://cdn.shopify.com/s/files/1/0429/7683/7785/files/sagitafudowelagab.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/75583838369.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/fafigogakuxejawefenazefij.pdf
    • https://cdn.shopify.com/s/files/1/0434/6894/7616/files/rizejisikekepekadir.pdf
    • https://cdn.shopify.com/s/files/1/0433/8787/9580/files/16088614978.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/79876890602.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_off000051c9.bin
a5496ca12eea4d7aa6ab1fb66f7c70bb092b9556c601c6c3947b0d783539dfab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51C9 5140 bytes
font_01_sfnt_off00006359.bin
77ce749365493bc9059007c79b8938b7d3ec7527b41244720933e0dc0c35e17d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6359 10020 bytes

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