Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2041cb30a0fe075…

MALICIOUS

PDF

46.5 KB Created: 2020-08-31 00:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74294ade14fc78a2bbad16fe3ae17340 SHA-1: b6d9ca40a2db0047490c76488f0577aa5cd71bb0 SHA-256: b2041cb30a0fe075a3be755c4301651fb25866c88a6e788326c0ee23246c1f1b
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, specifically pointing to 'https://ttraff.cc/wix?keyword=system+mechanic+16'. This indicates the document's primary purpose is to redirect the user to a malicious site, likely for phishing or malware distribution. The presence of a PDF link farm heuristic further supports the malicious intent by suggesting the PDF is part of a larger SEO-based lure campaign. The document body contains obfuscated text and URLs, including the identified malicious redirector.

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/wix?keyword=system+mechanic+16
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/fodosu.pdf
    • https://cdn.shopify.com/s/files/1/0459/2287/7591/files/65396098862.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5174/files/judixugikuk.pdf
    • https://cdn.shopify.com/s/files/1/0440/3327/8102/files/nee_gler_eitimde_lme_ve_deerlendirme.pdf
    • https://static.usrfiles.com/ugd/8ba634_f0a15bd712c142a1819077b673daa124.pdf
    • https://static.usrfiles.com/ugd/b8c837_7656779f324e42e1b8aa0d9c175873b1.pdf
    • https://static.usrfiles.com/ugd/bfbc46_10577f3a0815436b86de4ba4da2279ce.pdf
    • https://cdn.shopify.com/s/files/1/0461/9465/5390/files/8622857890.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/48556583000.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2805/files/77718051356.pdf
    • https://static.usrfiles.com/ugd/02beb7_7afac1e58c664b07864b1b9109df1ee9.pdf
    • https://static.usrfiles.com/ugd/a838c0_dfd13eca8c6549a68e78a8306e645def.pdf
    • https://static.usrfiles.com/ugd/05900a_00b2da23aecb491d9961e5936ed3b136.pdf
    • https://static.usrfiles.com/ugd/b8c837_00a9562b2044405db30aef232bb75b87.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_off00007764.bin
9d2afb29eccbde8151cb7ed8eefdc0c51777d96d78b5477782168a37f1570679		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7764 5324 bytes
font_01_sfnt_off00008961.bin
9326220da3bffdcd1b49822f6b4bac68930dac7bc7219dc831744fd78ec97916		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8961 10524 bytes

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