Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c52d4a34b563ec…

MALICIOUS

PDF

37.4 KB Created: 2020-08-13 19:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7c8d8e3ee3225867382f62b6f4d35b3 SHA-1: 72dde38bd583646168fe773e132d94cc5e2cec32 SHA-256: 30c52d4a34b563eccd5b326c40e599e7807f8d55d1e5542c62643bf52011be52
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, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading a PDF, specifically mentioning 'Romeu e julieta baixar pdf'. This suggests the primary goal is to redirect the user to a malicious site, likely for further exploitation or phishing.

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/wb?keyword=romeu%20e%20julieta%20baixar%20pdf
    • http://files.ezvietnamese.com/uploads/1/3/0/7/130739535/3345741.pdf
    • http://files.battambangparish.org/uploads/1/3/2/6/132681002/d767baf407e6.pdf
    • http://latet.fccwareham.org/uploads/1/3/0/8/130874422/6f924d25027c.pdf
    • http://mesewurob.northstarcharlotte.org/uploads/1/3/2/6/132696111/593749.pdf
    • https://cdn.shopify.com/s/files/1/0436/2502/1603/files/34159848992.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/podududugarelebizu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/lovabekabogejasadazexi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8239/files/88293441713.pdf
    • https://cdn.shopify.com/s/files/1/0440/6748/7894/files/tufaluribo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/protocol_in_computer_network.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9768/files/psychology_books_in_urdu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/2010/6404/files/stalking_jack_the_ripper_vk.pdf
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/ali_baba_and_the_40_thieves_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/tebidibiwozoxamidowu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2392/4376/files/cornerstone_chords_d.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/95267114858.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_off00005126.bin
ccb3ac312649fdc06650f70beb95d10741ab4b9b0d5a976825921a7472ff87d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5126 5300 bytes
font_01_sfnt_off0000631d.bin
b2c3777ff36dce17c8cda6b119837bcf43611b8119c008466a26a6d3a4cda464		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631D 11864 bytes

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