Malicious PDF — malware analysis report

Static analysis result for SHA-256 21e2b7186daf4c3d…

MALICIOUS

PDF

41.6 KB Created: 2020-08-23 22:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23d5cf77fc4d80c082ac1207d37ffd68 SHA-1: 64cfeaad3ebcfeb0a1f6f72b3035ee5ecd379eab SHA-256: 21e2b7186daf4c3d91d1f285cae95d8b93b841e4f021b5789ce0dd02bc1891ce
130 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One prominent link, 'https://ttraff.ru/pify?keyword=autocad+2014+manual+pdf+free', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and appears to be designed as a lure, likely to trick users into downloading malware or visiting a phishing page.

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=autocad+2014+manual+pdf+free
    • http://files.southwesterngmtc.com/uploads/1/3/1/8/131857315/subazevironarag.pdf
    • http://files.nelkesommerdijk.com/uploads/1/3/1/4/131453109/nogexevutazu-levelunavox-zosesujuviz.pdf
    • http://files.crystalsontherocks.com/uploads/1/3/0/7/130775868/9dac0b.pdf
    • https://cdn.shopify.com/s/files/1/0440/5755/9190/files/i_m_gonna_yartz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2324/4191/files/84994414839.pdf
    • https://cdn.shopify.com/s/files/1/0434/5364/4966/files/juxapimolofawadovunez.pdf
    • https://cdn.shopify.com/s/files/1/0431/6620/4066/files/novobuzuzitukekaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/nazuximusijimiwarav.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2722/files/22726010967.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5464/files/sexepuzik.pdf
    • https://cdn.shopify.com/s/files/1/0429/8201/5135/files/varigopodinojifabopo.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_off000064f8.bin
795a142f17584d219ec145e02f957f9c1b3fb477cff475abbea03ed126f495df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F8 5528 bytes
font_01_sfnt_off000077b0.bin
18432df5194369a32164773c4dc028aeadfde890c33c61051368d25ea33ce17c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B0 10052 bytes

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