Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ea9b3f74fc7a0a…

MALICIOUS

PDF

42.0 KB Created: 2020-08-18 23:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ae0f6906eabcfecde83b81cdc215333 SHA-1: 64afcba69d47d027163cbd8abccbce21ef54db1e SHA-256: 37ea9b3f74fc7a0a67b9c819b4e7a449f77f89f7416c6430c7da64949574c44c
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic firing indicates a malicious redirector link to 'ttraff.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=asrock+z390m+pro4+manual', reinforcing the malicious intent. The presence of numerous links to other PDFs on Shopify domains, while some are benign, contributes to a link farm pattern, potentially for SEO manipulation or to obscure the malicious redirector.

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=asrock+z390m+pro4+manual
    • http://wirawiza.wgsrf.com/uploads/1/3/2/8/132814930/parajununegobox.pdf
    • http://moburizug.authortomanthony.com/uploads/1/3/1/4/131407005/840678.pdf
    • http://xanes.amariprofessionals.com/uploads/1/3/1/0/131070374/e0242e7542.pdf
    • http://wowix.dockconnectionllc.com/uploads/1/3/1/6/131606127/31d1043e5489.pdf
    • http://vifok.innerselfjourney.com/uploads/1/3/1/4/131407818/gepofazepagugo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5286/6463/files/anemia_slideshare.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/winosizutu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/recount_addon_wow.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1297/files/tips_to_improve_self_confidence.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/gegides.pdf
    • https://cdn.shopify.com/s/files/1/0437/0202/6393/files/lemanonijukugateware.pdf
    • https://cdn.shopify.com/s/files/1/0429/8588/1753/files/english_words_meaning_in_urdu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1682/1663/files/43981565691.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/52611304866.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_off00006393.bin
fe48bf6d6cb368e9a604076daac6ff4783997685822d36fc17bf757c804fcb78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6393 5732 bytes
font_01_sfnt_off000076f9.bin
2d0d7187deab8e39f692c155be7ab067093cb210af4394fc0ad3a834017e111f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F9 10656 bytes

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