Malicious PDF — malware analysis report

Static analysis result for SHA-256 58463ce667ede7b7…

MALICIOUS

PDF

43.9 KB Created: 2020-08-12 23:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c32a80f14eb0f18893d10271210f13e SHA-1: a2ae6bc254bc8456c0681fc3cb8419be137777a9 SHA-256: 58463ce667ede7b7c70f3441658e1aa548d12a6cbaa61a8a9707897e15057c21
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/wb?keyword=introduction%20to%20modern%20information%20retrieval%20chowdhury%20pdf`. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs, some of which host unknown content. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent. The primary goal appears to be redirecting the user to malicious infrastructure via the embedded link.

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/wb?keyword=introduction%20to%20modern%20information%20retrieval%20chowdhury%20pdf
    • http://mufos.ellieaaron.com/uploads/1/3/0/7/130776445/1c4799.pdf
    • http://nomonor.awallowagal.com/uploads/1/3/0/7/130739006/getekiwofekuj_pafezuwe.pdf
    • http://files.studio17hairsalon.com/uploads/1/3/1/1/131163859/bezumo-fovovulewijokew-sizifolarugusi.pdf
    • http://files.smartislandregion.com/uploads/1/3/2/6/132681219/zawokelifubis.pdf
    • http://files.greatnewsuk.co.uk/uploads/1/3/1/8/131871618/rovilipamalemobuvo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7387/1767/files/good_rules_for_discord_servers.pdf
    • https://cdn.shopify.com/s/files/1/0438/5311/9648/files/gkt_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/89637814263.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/59269099424.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/ruwuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/7861/4168/files/ruvenivogureriparogobo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8099/8298/files/fubewefituzugezigir.pdf
    • https://cdn.shopify.com/s/files/1/0428/6342/7751/files/techniques_of_qualitative_data_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/92638550134.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_off00006b41.bin
123b832c23b0140c5a993fab119e4f0c8a823a90c17c5386d98c0c2ce9302159		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B41 5408 bytes
font_01_sfnt_off00007d90.bin
74cff50dc7379309d2f5f8e88352e6860562ab6e8ac5d15149dee9678f0a8483		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D90 10992 bytes

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