Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c5617a44cfbdda…

MALICIOUS

PDF

61.7 KB Created: 2020-09-02 08:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3b8f3ecf27a755a8645a617acab1d19 SHA-1: 2f03b4a0f66c8f3719219e0fbfb78fcfb8552f97 SHA-256: 44c5617a44cfbdda8be732d2f33937b85b64ac18479bab7ec2ce594d098571a8
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=define+economic+development+pdf', is designed to lure users into clicking it under the guise of a definition. The ML classifier also strongly indicated maliciousness. The document appears to be a social engineering lure to redirect users to 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.link/wix?keyword=define+economic+development+pdf
    • https://static.usrfiles.com/ugd/76de1a_58afc45d6bc2452ba16c25234eba66de.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd3d900482cb45d59024eacf05b8b21b.pdf
    • https://static.usrfiles.com/ugd/9df9d6_34ed86f2233842338a7f245a3f439748.pdf
    • https://static.usrfiles.com/ugd/0f5b72_d379d8a4bd58435c9511fd96787bbce3.pdf
    • https://static.usrfiles.com/ugd/b8c837_71b4bd9af7c34dd595f3b35094a96bbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd4141fcf85948148f7b269342f39ab0.pdf
    • https://cdn.shopify.com/s/files/1/0430/6472/1562/files/80692903414.pdf
    • https://cdn.shopify.com/s/files/1/0438/9843/7787/files/word.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5708/files/ganesh_marathi_aarti_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/zudigajit.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2893/files/dabejemubiz.pdf
    • https://static.usrfiles.com/ugd/f9d4cd_c98c5f086ca847bea090290f8eb78853.pdf
    • https://static.usrfiles.com/ugd/c1108c_a496242b70cf4a45b48dc1a1964ecf12.pdf
    • https://static.usrfiles.com/ugd/5befcb_946e4e02521e484db8addd633c0e12cf.pdf
    • https://static.usrfiles.com/ugd/9c66ff_698ef7859cd3483fbb6b68d6f2c4137a.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_off0000b219.bin
7c44e2fda565b79512a8591ea29cebb60529e1dccd67e6cbb9121649b03b1f3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB219 4876 bytes
font_01_sfnt_off0000c2b2.bin
e60200aeca095656ebcc0536aee77327c0b318e0ecb1bbb244a6cd4d241c7bb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B2 12128 bytes

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