Malicious PDF — malware analysis report

Static analysis result for SHA-256 b06d8ad355076b1e…

MALICIOUS

PDF

50.7 KB Created: 2020-08-23 02:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00d6f59c655598703e17626ca59443a6 SHA-1: fa27cc654a6f31671f64bf3d67923a3ae0dafdce SHA-256: b06d8ad355076b1e3580ffedf89653c09633402a66caa49d66e68e5edf516adc
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The primary malicious URL is https://ttraff.cc/pify?keyword=cervical+intraepithelial+neoplasia+pdf, which likely serves as a redirector to a malicious site. The presence of a large number of benign-looking links alongside the malicious one is a common social engineering tactic.

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=cervical+intraepithelial+neoplasia+pdf
    • http://files.nhpsathletics.com/uploads/1/3/2/6/132695714/d5275.pdf
    • http://files.dappsinfintech.com/uploads/1/3/0/9/130969265/cca6a.pdf
    • https://cdn.shopify.com/s/files/1/0428/2508/9191/files/pijogekizupakajowinuxizi.pdf
    • https://cdn.shopify.com/s/files/1/0461/9114/9214/files/antichrist_2009_movie.pdf
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/65457143174.pdf
    • https://cdn.shopify.com/s/files/1/0431/9445/0082/files/lasesufuj.pdf
    • https://cdn.shopify.com/s/files/1/0440/7610/5893/files/top_100_ps2_games.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/34038306428.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3383/files/soil_biota.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/67983233476.pdf
    • https://cdn.shopify.com/s/files/1/0435/9893/8274/files/avocado_salad_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/abnormal_psychology_an_integrative_approach_7th_ed.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/bare_infinitive_verb_list.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_off0000882d.bin
186d596716b5e1f7e43919da40e680b19392d9535b3cb4b0aa93d625ac23b033		 pdf-font-stream PDF embedded font (sfnt) at offset 0x882D 5208 bytes
font_01_sfnt_off000099d8.bin
61de89be6e55a6cc48b41adcb517ff54ee331c322919362a041f7f70e2a82131		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99D8 10696 bytes

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