Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf9d101a34be78a6…

MALICIOUS

PDF

42.8 KB Created: 2020-08-23 09:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02bb7e075ba2a05d31b694db5ad606a0 SHA-1: 77bec878af3945a9ad03ad9e54cd6308c21313f7 SHA-256: cf9d101a34be78a6413d73618563397da822406864429df81c998127928f7ba5
150 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing a malicious redirector link to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to potentially untrusted domains. The ML classifier also strongly indicated maliciousness. The document body contains the malicious URL and several other PDF links, suggesting a lure to external content.

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=bolos+formatos+variados
    • http://tafuvuvuj.joshuahettwer.com/uploads/1/3/0/7/130739674/5260c8f61.pdf
    • http://lagugopub.pgfintegrations.com/uploads/1/3/2/6/132683286/nubaz.pdf
    • http://wusow.ddmusicgroup.com/uploads/1/3/2/8/132814930/3735391.pdf
    • https://cdn.shopify.com/s/files/1/0428/9216/5279/files/vamagumuzamitidimafida.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/49008285721.pdf
    • https://cdn.shopify.com/s/files/1/0435/9772/5864/files/79376119528.pdf
    • https://cdn.shopify.com/s/files/1/0439/2199/7979/files/37777702209.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/xuniramobelizevizo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8752/7078/files/81245474980.pdf
    • https://cdn.shopify.com/s/files/1/0435/4611/6248/files/malayalam_bible_study_romans.pdf
    • https://cdn.shopify.com/s/files/1/0435/4949/1359/files/sharpness_1000_sword.pdf
    • https://cdn.shopify.com/s/files/1/0440/6552/1814/files/62748205427.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/
    • https://cdn.shopify.com/s/files/1

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000662d.bin
cc090fcd7b68fc6d79d99d32fdd2e8e9fead923436246505a0d3f1ab566074d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x662D 5164 bytes
font_01_sfnt_off000077a8.bin
40ff558b13d43932a609a1cdf00408f7fb1e2608b426c418d2095cd005213df2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A8 11416 bytes

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