Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b93ccebe81ef972…

MALICIOUS

PDF

39.2 KB Created: 2020-08-11 11:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01f3c6e756619905338c98e7ae0e766f SHA-1: c71186a14875571e6063175d46c66b3d96cd52cd SHA-256: 9b93ccebe81ef97283fad45f28e3e5f073c6269f11097596e37c6d99bf56fdb0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary malicious redirector link disguised as a CCTV installation diagram. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and other SEO-optimized PDF links, suggesting a phishing or redirection attempt to a malicious site.

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.cc/wb?keyword=cctv%20installation%20diagram%20pdf
    • http://files.simonheptinstall.com/uploads/1/3/1/3/131381679/vivijunipe.pdf
    • http://files.newteachersretreat.com/uploads/1/3/1/0/131070374/kojesiribesenigewuru.pdf
    • http://gegelafo.theohanadivecompany.com/uploads/1/3/0/7/130738731/zifajamorekati.pdf
    • https://cdn.shopify.com/s/files/1/0429/8070/4405/files/51992817792.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6161/files/bangkok_thailand_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/2660/4447/files/milemuwesiwanowolufef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jezimix.pdf
    • https://cdn.shopify.com/s/files/1/0437/0504/1051/files/aims_and_objectives_of_partnership_firm.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/ashampoo_burning_studio_18_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4087/files/87996368750.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/44687393156.pdf
    • https://cdn.shopify.com/s/files/1/0433/5520/9879/files/barriers_to_curriculum_innovation_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0437/4590/2746/files/pexumuru.pdf
    • https://cdn.shopify.com/s/files/1/0438/1127/4914/files/66211773687.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_off00005bd3.bin
ddd9e90a478e8dd87da0d945070a8c1b3ae97d3dc57576927513b6555ff39e9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD3 5440 bytes
font_01_sfnt_off00006e3c.bin
bb00ddfadd3836357b6f7ad0949fa53fd50b12228a2180b1e6724ea9e63f231e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3C 10076 bytes

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