Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f239cfb184b677…

MALICIOUS

PDF

42.1 KB Created: 2020-08-19 02:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a561028faf88d62da5553e60c5eb2cd SHA-1: d285aeddb95739d4b242e8f3148add5eb60f62d1 SHA-256: 52f239cfb184b677603751403fe914cbae3adddc49c37a54b239961382539dc0
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious link, 'https://ttraff.ru/pify?keyword=cpr+guidelines+1990', is presented within the document body, disguised as 'Cpr guidelines 1990'. The document also features a link farm heuristic, pointing to a large number of external PDFs, many hosted on Shopify. The overall pattern suggests a phishing or redirection attempt to a malicious site.

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=cpr+guidelines+1990
    • http://kutubaba.aoifekane.com/uploads/1/3/1/6/131636725/fijuwufosinawug.pdf
    • http://dalefegen.phyllisthompson.net/uploads/1/3/1/1/131164250/pewudefojuximixogafe.pdf
    • http://files.thenauticalartsworkshop.com/uploads/1/3/1/6/131606035/bikebawifutir.pdf
    • https://cdn.shopify.com/s/files/1/0433/4744/3865/files/josux.pdf
    • https://cdn.shopify.com/s/files/1/0438/5443/0368/files/60087854285.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2823/files/literary_terms_practice_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/youtube_video_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/5570/1398/files/telecharger_les_journaux_algeriens_d_aujourd_hui_en.pdf
    • https://cdn.shopify.com/s/files/1/0433/1103/8632/files/double_sided_business_card_template.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_off0000670c.bin
3b1dec21613b11d6a8762aedbfec20df4c155a28497849cc8de021bd6e9568e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670C 5172 bytes
font_01_sfnt_off000078b7.bin
afc3e4589b144a3442a0774d97ad0697890b1903b7e51a8f29ef9e3198035a32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B7 10452 bytes

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