Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32d3c0e67270b0c…

MALICIOUS

PDF

40.2 KB Created: 2020-08-22 11:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d47575c3b3bbf996e64e5906c27debc SHA-1: ffdaaf35f9fc46b59f6321056b272e454ba46d0a SHA-256: b32d3c0e67270b0c3308528e5b3decb5f6ef89f62d3afcb34f7edba67ced082b
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=ac+joint+pain+exercises+pdf'. This URL is designed to redirect users to potentially harmful content. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure for 'ac joint pain exercises'.

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=ac+joint+pain+exercises+pdf
    • http://zavawuw.ournet.online/uploads/1/3/1/3/131381428/feguditafagugapurot.pdf
    • https://cdn.shopify.com/s/files/1/0429/8457/1031/files/d-_400_schedule_s.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5654/files/mupejefuzosupo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/iron_deficiency_anemia_symptoms.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/google_play_games_for_computer.pdf
    • https://cdn.shopify.com/s/files/1/0436/0326/3650/files/debt_acknowledgement_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/4542/8122/files/zunivezujel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.pdf
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/fozubomijezaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/tuneve.pdf
    • https://cdn.shopify.com/s/files/1/0436/9635/7530/files/calculus_12_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/31347474212.pdf
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/cover_lagu_senorita_via_vallen.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_off000061ed.bin
b6b050be7395aea74f850b2641ceaf6ae28a32bfc7e514eb41e079ff1208f313		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61ED 5248 bytes
font_01_sfnt_off000073d6.bin
a23f5d68c131374232d1d7f7d4214c4453fb22eff217bf2f03d4f996b4bf455f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D6 9484 bytes

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