Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b2f1785e0f6dc3…

MALICIOUS

PDF

43.9 KB Created: 2020-08-20 19:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd8044c92c4c3ebfbfd736dc292cb415 SHA-1: 357b447b23322dc477f808cf19e662e3decd4a7e SHA-256: f3b2f1785e0f6dc3484d6f28143cd495ef3ce1618275d91a9a62d65bc8295222
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a link farm strategy, likely to obscure malicious destinations or to generate traffic. The ML classifier strongly supports the malicious nature of this PDF. The primary malicious IOC is the redirector URL, which likely leads to a phishing or malware delivery site.

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=hrithik+roshan+agneepath+movie+songs
    • http://files.drshoshana.com/uploads/1/3/2/7/132741020/1fa7d936441.pdf
    • https://cdn.shopify.com/s/files/1/0430/0272/4506/files/lidefewivokiwewizarap.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/minokofofinota.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/vudetebowomilomutezagone.pdf
    • https://cdn.shopify.com/s/files/1/0430/3149/4810/files/gobabuwedoras.pdf
    • https://cdn.shopify.com/s/files/1/0433/6559/7342/files/50999326741.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/mosuvamewadewubu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/mazda_android_auto_retrofit_review.pdf
    • https://cdn.shopify.com/s/files/1/0450/0806/0574/files/farmacos_antiarritmicos_clasificacion.pdf
    • https://cdn.shopify.com/s/files/1/0434/9201/6280/files/amapiano_2019_jobe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/sunefufoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/zajijababitiwebajom.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1562/files/gilofogudamuzarosozopi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2388/4711/files/84337528752.pdf
    • https://cdn.shopify.com/s/files/1/0430/6167/4133/files/jezopako.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_off00006785.bin
90eb6857052087d387673f6c47583e664693d20800ee79b262f2ff73e7ee65f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6785 5284 bytes
font_01_sfnt_off0000795c.bin
909438f4561a9d5e10d8bb2f3374bea7925075e574c8fdc582d951d661e7a2e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795C 13024 bytes

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