Malicious PDF — malware analysis report

Static analysis result for SHA-256 539ac589c77780ba…

MALICIOUS

PDF

43.8 KB Created: 2020-08-30 22:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0051b237bad73cf6fcb077029173e042 SHA-1: c1e1db71c063db885a97d078291a903b596de697 SHA-256: 539ac589c77780babea950b9835924696fbceeae90404dbcb83628c600c8ec7b
150 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a redirector link pointing to 'ttraff.com'. Additionally, a critical heuristic detected a mass external PDF link farm, with many links hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the URL 'https://ttraff.com/wix?keyword=the+white+man+marches+on+lyrics', which is likely the primary malicious destination.

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/wix?keyword=the+white+man+marches+on+lyrics
    • https://cdn.shopify.com/s/files/1/0433/0363/3051/files/bubob.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6555/files/bewibajetitavufazajaxak.pdf
    • https://cdn.shopify.com/s/files/1/0433/2273/6798/files/kosifaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/opera_mini_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0439/0292/7003/files/ankamall_sinema_bilet_al.pdf
    • https://cdn.shopify.com/s/files/1/0437/7434/5365/files/xufovaviwefape.pdf
    • https://cdn.shopify.com/s/files/1/0434/5610/2565/files/xopakinagexexulefefemelus.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7508/files/69192571351.pdf
    • https://cdn.shopify.com/s/files/1/0436/1378/2179/files/89518854852.pdf
    • https://cdn.shopify.com/s/files/1/0438/7789/2251/files/kadobumusuleb.pdf
    • https://cdn.shopify.com/s/files/1/0428/5045/1623/files/56869299434.pdf
    • https://static.usrfiles.com/ugd/b8c837_99ad1b897190417794d4720556388221.pdf
    • https://static.usrfiles.com/ugd/0779a3_54be0fd5bdcf4e1691465062425676d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_36ab2292abc746c7bd03bf81886881ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e5904981fad4c5d9f59ff213e0e88e6.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_off00006cc8.bin
ce27e8903e6d687c7d6f99882724f535dbb6a0343c02553e21675297ec2d3261		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC8 5180 bytes
font_01_sfnt_off00007e4d.bin
ec0a49920d468eec6ce6557c371e27aaef2fd2c4fffc6049de906a4626a057cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4D 10596 bytes

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