Malicious PDF — malware analysis report

Static analysis result for SHA-256 583a8613df9b9963…

MALICIOUS

PDF

51.2 KB Created: 2020-08-10 10:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be94183d171d67e80c98e0c512bc45aa SHA-1: 211310d0de7ab7872f9e3d8d8a2732b29aad64c6 SHA-256: 583a8613df9b9963a7063e5422c5be5b9d6b3f5303cb760e2eb60774d3eb8c78
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though partially corrupted, suggests a lure related to 'classification of antiasthmatic drugs pdf'. The presence of numerous external PDF links, many hosted on Shopify, further supports a link farm or SEO poisoning tactic. 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=classification+of+antiasthmatic+drugs+pdf
    • http://files.geiusa.com/uploads/1/3/0/7/130738562/gapenuvagenexisiboj.pdf
    • http://files.athenasavatars.com/uploads/1/3/1/4/131453111/4295.pdf
    • http://files.lifespacedesigns.com/uploads/1/3/1/6/131637606/kuxasenojez.pdf
    • https://cdn.shopify.com/s/files/1/0428/9855/5043/files/68791067323.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/tratamiento_para_artritis_reumatoide.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/vumibegume.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/nefekifanugosulafar.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/nazorufitivek.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/26385811712.pdf
    • https://cdn.shopify.com/s/files/1/0439/3464/6440/files/81704109313.pdf
    • https://cdn.shopify.com/s/files/1/0436/6493/3014/files/lifixiwaxurelebevesa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/72532440171.pdf
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/the_curious_case_of_benjamin_button_text.pdf
    • https://cdn.shopify.com/s/files/1/0430/4817/3722/files/sodufiwutoxine.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080f7.bin
51fdace8bd53b7d2e6af2c0ab3a57c298b99a0f760d42a36c32010743562cd6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F7 1684 bytes
font_01_sfnt_off0000895b.bin
ba4e4ee74127ac92dd75357d542b0eb001207a7772f154da134e4e9367c0a67e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x895B 5476 bytes
font_02_sfnt_off00009bc7.bin
8d23b0603ce353a3139c4b20ab72c569949f88bc3b04d5392ec74c590721a8c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC7 10492 bytes

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