Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa234f7d38c87b38…

MALICIOUS

PDF

40.0 KB Created: 2020-08-31 11:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54774f4ba56fbf2bf5b9c79c9efd5682 SHA-1: f367cb3e55d5f3b6f7e90c0a27fb7569b502b42d SHA-256: fa234f7d38c87b3839e20358afcd0b7d500f10b78b94f7bedaa86a0305ee2a61
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO poisoning to improve search engine rankings for malicious sites. One prominent URL, https://ttraff.ru/wix?keyword=touchpad+driver+windows+10+hp+pavilion, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Touchpad driver windows 10 hp pavilion', suggesting a lure to trick users into visiting the malicious link under the guise of downloading a driver.

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/wix?keyword=touchpad+driver+windows+10+hp+pavilion
    • https://cdn.shopify.com/s/files/1/0434/8031/8118/files/affirmative_and_negative_sentences_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0438/4935/1328/files/naxowofexesagodeju.pdf
    • https://cdn.shopify.com/s/files/1/0440/7944/8216/files/91211386381.pdf
    • https://static.usrfiles.com/ugd/defcb2_8cfba85a2b3b44c68a443d85bc477f44.pdf
    • https://static.usrfiles.com/ugd/97493d_ca589e2f87244416b25ff985dd4a66cb.pdf
    • https://static.usrfiles.com/ugd/04e6f9_dbeb7faa128f420fa90abb6250b4cd1f.pdf
    • https://static.usrfiles.com/ugd/71fd01_548d71bd756d4cf49822444618ee6a26.pdf
    • https://static.usrfiles.com/ugd/d1d005_018eac5a5f5d4055b61482a80744c1ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2cd573a1f6f47bb9cf2796b46061e86.pdf
    • https://static.usrfiles.com/ugd/b8c837_f25449f8f3d245d2bead0c1867bef2d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_78becd815b094071a59ceb8afbc0b874.pdf
    • https://static.usrfiles.com/ugd/7d21c0_6b0f0904e7444448a207fb36e5d7d408.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_off00005dfa.bin
c109ee55e59289ebb7d2a0e189c4e1c6c0af97fd3ce196ebee34451779afa3a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFA 5456 bytes
font_01_sfnt_off0000709f.bin
b35af558e271451494d9a50def1c9e6c8368351c24daa0721e1b015d79a3834a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x709F 10172 bytes

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