Malicious PDF — malware analysis report

Static analysis result for SHA-256 57bf4ae13759a01e…

MALICIOUS

PDF

32.2 KB Created: 2020-09-10 03:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03d1bb6315c0a021f498ecb3c83f08ee SHA-1: 9720ee43a76341786fd423c7616c19ae5eb5a7a3 SHA-256: 57bf4ae13759a01ebd92386a708a516b8699eba0f7e4f50b4dd5b16c45963781
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF documents. One of the primary links, 'https://ttraff.com/wb?keyword=zinger%20wheelchair%20manual', is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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.com/wb?keyword=zinger%20wheelchair%20manual
    • http://files.extremeimplements.com/uploads/1/3/0/8/130874582/3464159.pdf
    • http://topog.boostfitness.co.uk/uploads/1/3/1/4/131406798/xereladatutifuvixaf.pdf
    • http://files.dancing4donations.org/uploads/1/3/1/4/131454098/figizu-junubipava-fokina.pdf
    • http://files.leftbrainwritings.com/uploads/1/3/1/3/131379034/4503081.pdf
    • https://static.usrfiles.com/ugd/221f3a_dd3255d3b0634540bc490be3d046d865.pdf
    • https://static.usrfiles.com/ugd/e33828_c0877ff2f0164c86af74220f01367036.pdf
    • https://static.usrfiles.com/ugd/f3cb45_f678ee1e85484560975eb3afb81cb42e.pdf
    • https://static.usrfiles.com/ugd/54dfea_6040c4e512c34325b28e3b9c09f7e47e.pdf
    • https://static.usrfiles.com/ugd/a18aa6_282340cc6c7f4dd585970dcc91cf6b15.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/foldl_vs_foldr.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2776/files/nurumedupapubuguvixon.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/o_saki_saki_re_song_audio.pdf
    • https://cdn.shopify.com/s/files/1/0431/9769/4109/files/96482957766.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_off00004281.bin
7b45a11bd20074016447603f68ce9a176fc88f64b269d54c585be531f13bad61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4281 5084 bytes
font_01_sfnt_off000053bb.bin
061f0fd6e3bd59f199c08054ca4e93af4a674a7ca7c5e11baf15dbf94bfb5b2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53BB 9572 bytes

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