Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2d8a468e755886…

MALICIOUS

PDF

48.1 KB Created: 2020-09-19 10:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97c525dd5b9727987cc4c9b4c0817758 SHA-1: bd556c6bd4b811c8dc055e28b99c8dd06bf12562 SHA-256: cd2d8a468e755886bb8fd29699c833be63873770f46b239515f943d110a7b96c
150 Risk Score

Malware Insights

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

The PDF contains a link farm with 24 external links, many of which are designed to appear as legitimate documents. The primary link, 'https://ttraff.club/wix?keyword=biochemistry+worksheet+section+3.1+answers', is identified as a malicious redirector. This suggests a phishing or scam campaign aiming to direct users to malicious content under the guise of educational material.

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.club/wix?keyword=biochemistry+worksheet+section+3.1+answers
    • http://nafazo.charmed-liebling.com/uploads/1/3/1/3/131384306/1179549.pdf
    • http://dixiz.duniaamir.com/uploads/1/3/1/4/131438019/kavibilazefi.pdf
    • http://jakanix.photosbylynnmarie.com/uploads/1/3/0/8/130813132/6b20c2b7278a.pdf
    • http://bazawad.amc3d.com/uploads/1/3/1/4/131482995/xabawo.pdf
    • https://4201b057-6950-44dc-879e-17ff240d6cf1.filesusr.com/ugd/607883_c1db31a685df4fe2a06d6c0b2e64c69b.pdf?index=true
    • https://56aa342a-1f30-4667-bf84-40c4dcbc9d36.filesusr.com/ugd/b463f2_14cbc857273247a59c968c214095117f.pdf?index=true
    • https://72264c7b-c45d-4ee1-974c-9cd907854215.filesusr.com/ugd/b463f2_f6088aa35f1c4fd9848de516a41c7104.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/5463997487.pdf
    • https://cdn.shopify.com/s/files/1/0431/0486/2374/files/76607013503.pdf
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/vibinuzepekisizomel.pdf
    • https://cdn.shopify.com/s/files/1/0463/0701/6866/files/22410805955.pdf
    • https://cdn.shopify.com/s/files/1/0435/9543/2099/files/72785250930.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_off00007d77.bin
547020eb05869da037bda9c29acfa1ac6d050d28cfe236e5667030195ac380bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D77 5564 bytes
font_01_sfnt_off0000905a.bin
a9803f96191e4b4d1152df8d4e1444efdc179a92455a7ef0ffe5e09600c096ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x905A 10232 bytes

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