Malicious PDF — malware analysis report

Static analysis result for SHA-256 c51f8a1acb17ec44…

MALICIOUS

PDF

70.1 KB Created: 2020-08-07 02:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b820d830502abdb1f18f661e17fff6b9 SHA-1: 8d9991bbd91145b2cbb47af0709761e1d7c52c51 SHA-256: c51f8a1acb17ec449e74d46bb5628e81e73d3732320b6303996e3ccb442703a1
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 pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to the 'ttraff.com' URL, which is likely a phishing or malware distribution gateway.

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/pify?keyword=capteur+d+humidit%25C3%25A9+du+sol+analogique+et+num%25C3%25A9rique+pdf
    • http://files.smartupofficial.com/uploads/1/3/1/3/131383380/d7716.pdf
    • http://files.openartstrail.org/uploads/1/3/0/7/130739693/folurukivixem.pdf
    • http://kikuvok.robert-poole-law.com/uploads/1/3/1/3/131379246/f3706d127d299.pdf
    • http://jisakerem.eastbayspacover.com/uploads/1/3/0/8/130813765/b1c1f408065.pdf
    • http://kupis.renewcleaningservice.com/uploads/1/3/2/6/132695818/womevoketojikosututi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/25102457736.pdf
    • https://cdn.shopify.com/s/files/1/0435/9507/1651/files/les_nourritures_affectives_boris_cyrulnik.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/90514179646.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/6449971342.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/jepogalabikevolok.pdf
    • https://cdn.shopify.com/s/files/1/0431/5335/9005/files/introduction_to_data_acquisition_system.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/pobiwineken.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7626/files/wemat.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/nesefinatonaferigakugofar.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/rezilitesabokobegepun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32150460784.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/lifovixemuti.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_off0000cd01.bin
220a446cae9fee33314df7af2193d3ea6356fd3a3ad8ec4f998f4db709cff66e
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD01 5628 bytes
font_01_sfnt_off0000dfa6.bin
327a8383fc49e6e66a79d4796133a3ac71a9e5a27c328c1c83a7840da1643343
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA6 12908 bytes