Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4837b10d6189d8…

MALICIOUS

PDF

39.8 KB Created: 2020-09-01 21:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50ef047464a64bd97c5756d86e971feb SHA-1: 47e317e97ded6134cef26568968ec12d82d474d9 SHA-256: 9c4837b10d6189d882349576cf78c433e5a947e4af698c6d3ec72403612a4fec
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 'ttraff.ru' with a keyword suggesting cracked software. The document body, though heavily obfuscated, also contains this URL. The presence of numerous other links to PDF files hosted on static.usrfiles.com and cdn.shopify.com, as indicated by the PDF_SEO_LINK_FARM heuristic, suggests a link farm designed 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=ableton+software++crack
    • https://static.usrfiles.com/ugd/a298ce_ec7231f757e84f239de8628734f6f7dc.pdf
    • https://static.usrfiles.com/ugd/15cd4d_279dff4288b1436e9964ad133cdc2963.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_33468781a9d64af98ed20b608109f301.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/lego_architecture_studio_booklet.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/75650534323.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/99862654638.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/kadugapokujopipewenarut.pdf
    • https://static.usrfiles.com/ugd/8e1900_4a6a57738cab4cad82a01405c364f537.pdf
    • https://static.usrfiles.com/ugd/81d6a4_da103b34c85746409cc3f9d5702040a8.pdf
    • https://cdn.shopify.com/s/files/1/0432/7453/5067/files/nissan_forklift_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/3383/5173/files/como_llenar_un_recibo_de_arrendamiento.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_off00005d9d.bin
1a23f4ea51df7c78a89d714a60ea6893936e2135c5b4e8931e55e946e8cfc43f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9D 5160 bytes
font_01_sfnt_off00006f53.bin
846dd0b996094ce4e58f5f44ebefe8a24100ccf49644bf5854e433435c56399d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F53 10492 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.