Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d78de71b6bf3cd0…

MALICIOUS

PDF

43.9 KB Created: 2020-08-27 22:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4d37da691c7e99c3daf8597d2dfcac5 SHA-1: 8f32d5e03e5176cd9ab0ed2331762849ba9596c1 SHA-256: 2d78de71b6bf3cd04decb67343312c23ec02b313fa0dba65d84cabaab35a0a6b
150 Risk Score

Malware Insights

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

This PDF file contains a link farm and a malicious redirector URL, indicating a phishing or redirection attempt. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which is likely used to funnel users to a malicious site. The document body contains a title related to math, likely a lure.

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=nombre+relatif+addition+soustraction
    • http://files.katekinsey.com/uploads/1/3/0/7/130739658/firudaxokadexabo.pdf
    • http://fopoju.flowersfromsarahsgarden.com/uploads/1/3/0/7/130739892/vopemuvofe.pdf
    • http://vamixino.fayettevillegatreeservice.com/uploads/1/3/1/1/131164250/3892104.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/xetegijovigomi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/limitations_of_ethnographic_research.pdf
    • https://cdn.shopify.com/s/files/1/0435/1236/5211/files/posatipaveliku.pdf
    • https://cdn.shopify.com/s/files/1/0428/8407/1583/files/98614609024.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/muwifezogatimizasuriroze.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/effects_of_globalisation_on_the_environment.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/carista_beta_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/berlitz_espanol_niveles_1_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/thomas_calculus_early_transcendentals_11th_edition.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_off00005cd6.bin
a054da99989d30c8173205c5c8bf58a9537fa09be9dc4777395ecbd52a78be68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD6 5160 bytes
font_01_sfnt_off00006e42.bin
0efeeab1150563af641b0ab37d277aad34359cc23836398ef6f0998e6076d4a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E42 12116 bytes
font_02_sfnt_off0000949f.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x949F 4324 bytes

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