Malicious PDF — malware analysis report

Static analysis result for SHA-256 3637edeb9b324927…

MALICIOUS

PDF

41.1 KB Created: 2020-08-09 23:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76e73bc6c29805cb5618746ac252472d SHA-1: 2764a3bca226b0d40d2a22a8cf082e35650b97e4 SHA-256: 3637edeb9b3249271155847471df7588f6338c82cf3bec545f3a4925d633f00b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, 'https://ttraff.ru/pify?keyword=amoeba+proteus+classification+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this malicious URL and other links, suggesting a social engineering tactic to drive traffic to malicious infrastructure.

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=amoeba+proteus+classification+pdf
    • http://files.learnwithmmg.com/uploads/1/3/2/8/132814427/xoxuvugekot_sojitide_wavejopibu_wurixazofawik.pdf
    • http://files.marineconservationlab.org/uploads/1/3/0/8/130874526/zikogoleminumebew.pdf
    • http://files.theswingrevue.com/uploads/1/3/1/4/131438157/ponefivuluzo-desirezazi-rorijuliked.pdf
    • https://cdn.shopify.com/s/files/1/0430/5374/4279/files/apostila_caldeiraria.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4632/files/manezamavixozagupiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/52807622013.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/gaketujegez.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7901/files/nosejodalomepetawetagap.pdf
    • https://cdn.shopify.com/s/files/1/0436/0372/2398/files/nijezugetasuwowim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9481/9484/files/17748220144.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4466/files/20101395511.pdf
    • https://cdn.shopify.com/s/files/1/0434/0806/4677/files/gastrointestinal_tract_anatomy_and_physiology.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/21515956720.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/92424105848.pdf
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/86113098499.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_off00006285.bin
f141122e0d64587757aae637d0e54827d5ce01f6c4a919a907f7193d1ac943b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6285 5432 bytes
font_01_sfnt_off000074db.bin
26e1bfabd328920754da64f21cee357ceeffbf84cb54dcca4d9957c0a9fbb6bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74DB 10152 bytes

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