Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa9b74a25a09915…

MALICIOUS

PDF

41.6 KB Created: 2020-08-17 05:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8fb79ad419dec1cb91f0b00d3ea15b8 SHA-1: 02e02b84d9637a99144a81bea111cf1d75f73ecd SHA-256: faa9b74a25a09915618fd81d08e610d77430afc14ae42960f0c082a4e0248ec4
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, specifically pointing to 'ttraff.cc' with a lure for 'bloons tower defense 2 apk'. This indicates an attempt to trick users into visiting a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector URL is sufficient to infer a phishing or malware delivery attempt.

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=bloons+tower+defense+2+apk
    • http://files.kayandthechaos.com/uploads/1/3/1/3/131379846/revazugule_potadolal.pdf
    • http://files.sloreunion1969.com/uploads/1/3/2/7/132712147/63d4163750.pdf
    • http://mifusuva.thehenrysplantfarmonline.com/uploads/1/3/1/6/131636725/2224172.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/zorudadof.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/teaching_approaches_in_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0438/9906/0392/files/examples_of_angle_of_elevation_and_depression_with_solution.pdf
    • https://cdn.shopify.com/s/files/1/0454/2434/5244/files/arabic_french_bilingual_visual_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/tinekavegedefujon.pdf
    • https://cdn.shopify.com/s/files/1/0434/6888/2072/files/ranaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2089/3851/files/introduction_of_diabetes_mellitus_type_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/0458/4355/files/popefegezolekutupipa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5112/2842/files/dubuxodofurina.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/94507450830.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_off000063af.bin
7e508a4b0d76fe7047b0898f0b5b62637f744b6351d71b6abccde948865284ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AF 5372 bytes
font_01_sfnt_off0000761b.bin
563c94e5b4d421a91eaa0cb84846742310ba46007ed997fc4accc9c6d2de8908		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761B 10532 bytes

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