Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ebffb1cc800b28…

MALICIOUS

PDF

40.4 KB Created: 2020-09-05 06:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abc24590351eaa3c01ce3435ca8b10e1 SHA-1: 61490c288e19701c0b241bd7166a3ec3ae5fedd3 SHA-256: c1ebffb1cc800b289baed1127f0b15e2dd0ce0636e98c5ae70abd01e7174c4bc
150 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a 'reporter newspaper amharic version vacancy', suggesting a lure to entice users to click the malicious link. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive document.

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=reporter+newspaper+amharic+version+vacancy
    • https://static.usrfiles.com/ugd/69b86f_d228adfef7bc45a983f13892a2dd1b03.pdf
    • https://static.usrfiles.com/ugd/02af14_c767bd6914214ce480e1873615bd93f5.pdf
    • https://static.usrfiles.com/ugd/80685d_38e4d651f7484c7eb72ff0eb9f9bb645.pdf
    • https://static.usrfiles.com/ugd/b926a8_aa4cb054a586488198b851ca243e43dd.pdf
    • https://static.usrfiles.com/ugd/5438e3_c70c52a9abf6480aa6a031a4ad7ea312.pdf
    • https://static.usrfiles.com/ugd/b8c837_f035972904dc4f688e7143e1609cbd03.pdf
    • https://static.usrfiles.com/ugd/63d3ad_83e5692274d049f88c8fe6bd0a13ea33.pdf
    • https://static.usrfiles.com/ugd/30e015_f876df456ea64e909b77690bc1aea040.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/accounting_equation_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/1095/7210/files/enctitlekeys._bin_qr_code.pdf
    • https://static.usrfiles.com/ugd/8da65f_60b758861c2b4c04b2dbf1117e8073c2.pdf
    • https://static.usrfiles.com/ugd/158fb9_00c424062a3d4e3982fe3039505f1514.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_off00006004.bin
43b4aa6db6fba9bb6dea0252e0d1aa53e09691687cfed3339963f12f1f92975e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6004 5404 bytes
font_01_sfnt_off0000725a.bin
94cfa61cea2002566e621bfe841705e453cfbabcbb7d40f8b0207a6663bd5fdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725A 10024 bytes

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