Malicious PDF — malware analysis report

Static analysis result for SHA-256 399e45bd1d90958c…

MALICIOUS

PDF

41.6 KB Created: 2020-08-04 16:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d17af904d1cfcef1b6eb7cab4e9e315 SHA-1: 848d6ff6595961266bdd5b5bf8233d9401a4dc3b SHA-256: 399e45bd1d90958cd31163fbb4dd4a04081d683cd15c410ace1cc5b3e8e2921b
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body also contains the same URL, presented as a lure for converting PDF files to Word documents. This suggests a phishing or social engineering attack aiming to redirect users to malicious content. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=free+convert+a+pdf+file+to+word+document+for+editing
    • http://files.topgunathletics.com/uploads/1/3/2/6/132681213/fozubazazadigot.pdf
    • http://vepubiwa.rdpresets.com/uploads/1/3/1/4/131453598/rotumumusonon-kofoxugu-tabibemebipozew-xeruro.pdf
    • http://files.cottagefarmstables.com/uploads/1/3/1/6/131607565/mevopewajadubu-zinirufinuvopaf-walanemivu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4784/files/fokazafusibopabumix.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/bipumirapimepe.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7469/files/40618081621.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/49233009978.pdf
    • https://cdn.shopify.com/s/files/1/0428/3164/2780/files/35005478394.pdf
    • https://cdn.shopify.com/s/files/1/0430/4162/0119/files/asciidoctor_theming_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/ninixotebenakitora.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/biwijanas.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7966/files/guwopukesava.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/xiturixasegexoxowiwa.pdf
    • https://cdn.shopify.com/s/files/1/0435/6410/5886/files/52743372666.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_off00006313.bin
e8573475e137bdfc42098cb3ade9e88e553713bd11583a13dac0874768b0693e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6313 5404 bytes
font_01_sfnt_off00007580.bin
64bbd5baf58faff86f326140bed9d97bd788870ca8c3d7fc4f6b2a72efbc6998		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7580 10380 bytes

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