Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf1c4e6f7c3d7c0…

MALICIOUS

PDF

40.4 KB Created: 2020-08-12 13:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 577b09c69e6f882cc0abd40ba6de2f74 SHA-1: a3f7fecaf2d13ef032c39b7d38d77afdfc7ffb4f SHA-256: ddf1c4e6f7c3d7c030f2481622fb7e2c6749619e951288915e416802af78a5b9
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One such link, 'https://ttraff.cc/pify?keyword=alto+sax+sheet+music+pdf+free', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Alto sax sheet music pdf free', suggesting a lure to entice users to click the malicious link. The presence of multiple external PDF links, many hosted on Shopify, further indicates a link farm strategy to improve search engine ranking for malicious content.

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.cc/pify?keyword=alto+sax+sheet+music+pdf+free
    • http://fakijugi.ritahogan.net/uploads/1/3/1/6/131606490/9901162.pdf
    • http://ripav.brcofoundation.org/uploads/1/3/1/4/131406390/099447583c97.pdf
    • http://files.jakeryancreations.com/uploads/1/3/1/3/131380916/4314840.pdf
    • https://cdn.shopify.com/s/files/1/0434/5954/3192/files/9119723122.pdf
    • https://cdn.shopify.com/s/files/1/0438/1586/2434/files/hypixel_pe_ip.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/60866723092.pdf
    • https://cdn.shopify.com/s/files/1/0439/3032/1051/files/fozalebawexusojo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1336/files/nadosafulezerokukiluzud.pdf
    • https://cdn.shopify.com/s/files/1/0434/5462/7993/files/bengali_recipes_in_bengali_language_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4390/4927/files/namijatoginolebeber.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1220/files/ielts_writing_academic_answer_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/3992/files/12464797794.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/3083379374.pdf
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/dezigopiferemupoga.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_off000054d5.bin
99f876400710fb151c5c3068f359caee1ab7d6660034cad389fda8b8a820c1cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54D5 5452 bytes
font_01_sfnt_off0000673d.bin
5c08bad89f077d72a3b049a6f74b19e5573ba10670eddd5a37b584ec2dda9d3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x673D 14496 bytes

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