Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4b627df3e3fd06…

MALICIOUS

PDF

40.6 KB Created: 2020-09-02 01:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba4e6f058623376c0a15d28f5cb11feb SHA-1: 364c580ca63daf25aafdd00f7c1d34ecc7c27457 SHA-256: fc4b627df3e3fd06ef9992ad9653417d759d3875bbe8654b61e3bc39fc17c723
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a tactic to manipulate search engine results or distribute malicious content. The primary malicious URL identified is https://ttraff.me/pify?keyword=betalactamicos+definicion+pdf, which likely serves as a gateway to further malicious 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.me/pify?keyword=betalactamicos+definicion+pdf
    • https://static.usrfiles.com/ugd/89c6ad_6db541840c6845bdb5a83f487c5a32e9.pdf
    • https://static.usrfiles.com/ugd/c1de29_3d58abf2d63a4d1d8716ee81c7f2c76a.pdf
    • https://static.usrfiles.com/ugd/c0b427_b63ba7a05630459d9adfeb6a203c92d3.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/919998138.pdf
    • https://cdn.shopify.com/s/files/1/0436/9448/9755/files/61640001660.pdf
    • https://cdn.shopify.com/s/files/1/0439/0486/0328/files/27688062125.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8703/files/20441880331.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34515707504.pdf
    • https://cdn.shopify.com/s/files/1/0437/5475/0106/files/sufagudavovirotole.pdf
    • https://static.usrfiles.com/ugd/12dc78_1a5be538bbe8438ca7e4e59ddf3cfa81.pdf
    • https://static.usrfiles.com/ugd/067ecb_3e18297044ad4e1eb5dbd167ed626200.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_0e36a55f6f2a46b5853c7ef376d2794c.pdf
    • https://static.usrfiles.com/ugd/df4650_2657a3cd52ab4ed6b516e622e9e710cb.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_off00005eb8.bin
20ce47ab008917ec542f088318f91d29802d783be75eca6d9d137f1ca68fe2e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB8 5256 bytes
font_01_sfnt_off0000708c.bin
659f480dfa5b9bf5f372dff78a0012402e0a9371e44578067495eaf74c2e7bcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708C 10936 bytes

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