Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0bd06fb38d02ca3…

MALICIOUS

PDF

43.0 KB Created: 2020-08-19 09:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 950f17007cd307fbafaaeb127dd1ef0b SHA-1: 0aaaf1ad752e2b2f482bf31c02ff206d01a23499 SHA-256: c0bd06fb38d02ca327c9be0cd933234400f3307e731ffa608d4f2667f969ba1d
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector at `https://ttraff.ru/pify?keyword=belajar+excel+pdf+gratis`. This indicates a phishing or scam attempt designed to redirect the user to malicious content. The document body itself is heavily obfuscated but contains the same malicious URL and numerous benign-looking Shopify URLs, likely part of a link farm to improve search engine ranking for the 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.ru/pify?keyword=belajar+excel+pdf+gratis
    • http://files.inachildsname.com/uploads/1/3/1/4/131406811/ff1a386aed0c0c2.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/3069433643.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1365/files/estomatitis_aftosa_herpetiforme.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/paxesufepusip.pdf
    • https://cdn.shopify.com/s/files/1/0428/7479/8247/files/apocalypto_full_tamil_dubbed_movie.pdf
    • https://cdn.shopify.com/s/files/1/0453/1912/7195/files/proceso_administrativo_de_ventas.pdf
    • https://cdn.shopify.com/s/files/1/0434/7818/8198/files/story_elements_worksheets_8th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4885/files/12986784532.pdf
    • https://cdn.shopify.com/s/files/1/0437/7837/5831/files/surah_yasin_download_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/somefuruzututetug.pdf
    • https://cdn.shopify.com/s/files/1/0433/5196/5855/files/pruftechnik_alignment_center.pdf
    • https://cdn.shopify.com/s/files/1/0446/0973/2771/files/developing_tactics_for_listening_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f12.bin
4211bb2620e68ea5e1594531e600eb25369796b1f957df871cfd1e6ac3e262e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F12 5516 bytes
font_01_sfnt_off000071e1.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E1 1800 bytes
font_02_sfnt_off00007a6f.bin
494f768b5985d1046e603b1437429ce3b7f7651dd8d9fe6d397a7384f395072a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6F 10764 bytes

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