Malicious PDF — malware analysis report

Static analysis result for SHA-256 303ab0a44d0b21b6…

MALICIOUS

PDF

56.1 KB Created: 2020-08-12 09:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9843e264eeed66c9b857498bfb3fb6b1 SHA-1: eb9a5effbe636f7db562f7fefd257f8f2dab7e83 SHA-256: 303ab0a44d0b21b6d802b34db999c392219d3d4bc72770a6f45c18e3c9d205a4
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the target URL, suggesting the intent is to trick the user into visiting a malicious site by appearing to offer a valuable resource. The ML classifier also strongly indicated maliciousness.

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=goldman+cecil+medicine+26th+edition+pdf
    • http://nuxog.chasenigleheart.com/uploads/1/3/1/8/131871721/7452406.pdf
    • http://files.dreamingtreewomenscare.com/uploads/1/3/0/9/130969322/c7738fff2287e24.pdf
    • http://files.all4ucustomcreations.com/uploads/1/3/0/7/130775677/minezetibuler.pdf
    • http://files.napacandle.com/uploads/1/3/1/4/131408364/bebegesemomokon.pdf
    • http://files.rhythmresearchresources.net/uploads/1/3/1/6/131606127/gelizoxi-mevep-xuzumifam.pdf
    • https://cdn.shopify.com/s/files/1/0429/4321/7830/files/harvard_business_school_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/9774/2750/files/20044408674.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/alternative_investment_market.pdf
    • https://cdn.shopify.com/s/files/1/0438/6072/1829/files/tupozevemorajomo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2269/files/pathophysiology_of_anemia_of_chronic_disease.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1865/files/astronomy_101.pdf
    • https://cdn.shopify.com/s/files/1/0439/0469/6472/files/besupinusin.pdf
    • https://cdn.shopify.com/s/files/1/0452/2446/0445/files/fundamentals_of_rf_and_microwave_transistor_amplifiers.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/79630379814.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0629/files/aristophanes_lysistrata_trke.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/kesunasomofug.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/gadozixuniperefinuda.pdf
    • https://cdn.shopify.com/s/files/1/0440/3901/2502/files/weketopumaxebakapunudogi.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_off00009b97.bin
c7e75e09190aa4bcd1438450486c3b2403c812403c3553e2e25531aab927fca4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B97 5440 bytes
font_01_sfnt_off0000adf8.bin
e04b5e01c366c989acbb8d12440c7cc3f81bfa57a8cd246c618b2f06e15b3e76
pdf-font-stream PDF embedded font (sfnt) at offset 0xADF8 10936 bytes