Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b7e8d73ef54b2f…

MALICIOUS

PDF

50.6 KB Created: 2020-08-17 11:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99a2a47fd85beea10f18610bd8c9b3d0 SHA-1: 30a6c0aa618b0a0a931100b20d18a2f27772254d SHA-256: c8b7e8d73ef54b2f8f77a493f9211fe928e508be7cb66c5761c1cf04b9f6aa8f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'bumblebee the transformer images' and a URL pointing to a redirector, suggesting a lure to a malicious site. The presence of many external PDF links also indicates a link farm or redirection strategy.

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.ru/pify?keyword=bumblebee+the+transformer+images
    • http://files.pinnaclemountainphotography.com/uploads/1/3/1/4/131452771/6092893ca.pdf
    • http://files.scottyppart.com/uploads/1/3/2/7/132740586/5685006.pdf
    • http://files.studio08creative.com/uploads/1/3/1/4/131454766/f8dc13.pdf
    • http://files.bodoheiliger.com/uploads/1/3/2/8/132815367/4119678.pdf
    • https://cdn.shopify.com/s/files/1/0434/7586/1656/files/present_simple_continuous_exercises_intermediate.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/bootstrap_audio_player_with_playlist.pdf
    • https://cdn.shopify.com/s/files/1/0440/0100/1630/files/bridal_march_piano.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/fakurulot.pdf
    • https://cdn.shopify.com/s/files/1/0431/7773/8399/files/41928636909.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/bhoot_uncle_video.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/3057438861.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/94716105186.pdf
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/27256391929.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_off0000886d.bin
7b6411949fb095e75e289eac22eb721faec5e2ef26d4e753d1d666dcc07e4c7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x886D 5368 bytes
font_01_sfnt_off00009a91.bin
db3fce0c0293b2102b207ffd1358fdf948c0eefad710c10c3536879b15def988		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A91 10156 bytes

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