Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0151a723db51edc…

MALICIOUS

PDF

44.9 KB Created: 2020-08-12 14:33:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6563353182ff5beb749ae8d306db38c5 SHA-1: 09fdd5e85303e1c78711a768e0023a45ba3b74d2 SHA-256: b0151a723db51edcae6d4daf0b91ada3fe9fe614722b8ae08cc2b0c62c816bf1
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 Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wb?keyword=purulent%20pericarditis%20pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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/wb?keyword=purulent%20pericarditis%20pdf
    • http://files.pendrelracing.com/uploads/1/3/0/7/130775171/vinubowiwotuxitati.pdf
    • http://paxaro.24hrtowingriverside.com/uploads/1/3/1/0/131069934/8067438.pdf
    • http://files.teamhmac.com/uploads/1/3/2/3/132303320/5939541.pdf
    • http://files.boernebrandshop.com/uploads/1/3/1/4/131454521/8552911.pdf
    • http://files.mitalentzcompany.com/uploads/1/3/2/6/132681891/607ac08985f70f.pdf
    • https://cdn.shopify.com/s/files/1/0431/2504/7463/files/xagonisa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/18404622864.pdf
    • https://cdn.shopify.com/s/files/1/0438/0996/4192/files/35212560258.pdf
    • https://cdn.shopify.com/s/files/1/0434/3329/6028/files/can_kindle_read_books.pdf
    • https://cdn.shopify.com/s/files/1/0427/8019/7031/files/bjt_configurations.pdf
    • https://cdn.shopify.com/s/files/1/0432/8849/4236/files/befujomoxaki.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/sikikopipa.pdf
    • https://cdn.shopify.com/s/files/1/0439/8078/3774/files/virtualbox_windows_98.pdf
    • https://cdn.shopify.com/s/files/1/0437/7398/4919/files/adobe_viewer_for_chromebook.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/convert_to_word_adobe_illustrator.pdf
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/rumoxifupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/sony_erricsson_w580i.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/wii_point_generator_no_surveys.pdf
    • https://cdn.shopify.com/s/files/1/0438/7710/5832/files/vuxanibam.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_off000071d2.bin
3aa1163b512419cd6a241374d4fa899d2439c1f48e48481a25cfc2ffa30142b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D2 5152 bytes
font_01_sfnt_off0000835b.bin
4b4d1310648f667c49c57495cedf480b0ab04b751bd85ccb3c46dbf0d07d436a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x835B 10348 bytes

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