Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a062403f78ad20d…

MALICIOUS

PDF

51.3 KB Created: 2020-08-27 23:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c20be11d1093d1e914a2ff5b97bb7e73 SHA-1: ee492c933db4d9e124fe2ec9d1eb3fe832ce7ad2 SHA-256: 2a062403f78ad20d6b96f03f3a5ba66b29df067212992c5f914fd5449cbae5e6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=parenting+styles+pdf'. This indicates a social engineering lure, likely attempting to trick users into believing they are downloading a parenting styles PDF. The presence of a large number of external PDF links, many hosted on Shopify, further suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=parenting+styles+pdf
    • http://lasogire.justjilltoday.com/uploads/1/3/2/7/132740718/volebu.pdf
    • http://wupabakid.openroadcandy.com/uploads/1/3/1/3/131380005/1148766.pdf
    • http://kopubibe.leapdiscover.co.uk/uploads/1/3/2/6/132681947/4433490.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/86511812459.pdf
    • https://cdn.shopify.com/s/files/1/0440/8426/5110/files/21693111842.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/cisco_jabber_for_windows_planning_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/77008287537.pdf
    • https://cdn.shopify.com/s/files/1/0433/4813/2008/files/zagezese.pdf
    • https://cdn.shopify.com/s/files/1/0435/5129/3603/files/jejaduwegejigomanilekenox.pdf
    • https://cdn.shopify.com/s/files/1/0432/0890/0768/files/erasure_a_little_respect_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/23013281884.pdf
    • https://cdn.shopify.com/s/files/1/0438/0655/6320/files/89812602116.pdf
    • https://cdn.shopify.com/s/files/1/0440/0067/3950/files/feeding_guide_for_infants.pdf
    • https://cdn.shopify.com/s/files/1/0464/7888/5032/files/adobe_flash_player_for_chrome_filehippo.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_off00008b1d.bin
5c5ba6140c13c62a2f4dbd5a8a63446b34ff9f6ad4c4b5c734e429b52d2d0ef8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1D 5312 bytes
font_01_sfnt_off00009d3f.bin
9f617ee08ad1ae613c9c78b328862592926ac7791471f0637a896ab3e8616b67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3F 10300 bytes

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