Malicious PDF — malware analysis report

Static analysis result for SHA-256 33f8667c54684483…

MALICIOUS

PDF

49.6 KB Created: 2020-08-19 12:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6563595f4571cddb431d073946d9084d SHA-1: 4279cc1f7f6172760db5c7486c05216423ff6d5b SHA-256: 33f8667c54684483ef4941e597e4bb2b4061bec0cb29f7d1410b0959f216a92b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a song title and also includes the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link indicates an attempt to lead the user to a harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=bulava+teri+aaj+meri+galiyan+song
    • http://jusikoj.beegladefarm.com/uploads/1/3/1/0/131070357/6615909.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0428/7492/9308/files/lumixarik.pdf
    • https://cdn.shopify.com/s/files/1/0433/8860/0478/files/vudogoliwudidiperuwuxos.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/luzowaxeledesubigozokaj.pdf
    • https://cdn.shopify.com/s/files/1/0438/7926/8520/files/sesis.pdf
    • https://cdn.shopify.com/s/files/1/0431/5430/9284/files/radians_to_degrees.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3383/files/levabibezogalovedu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9699/0105/files/67313664952.pdf
    • https://cdn.shopify.com/s/files/1/0434/4676/3677/files/kagukogizogematunubewirif.pdf
    • https://cdn.shopify.com/s/files/1/0440/8508/4310/files/jitbit_macro_recorder.pdf
    • https://cdn.shopify.com/s/files/1/0433/8089/9991/files/dupiwuparizovimozuwof.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005865.bin
48a704767bca8044e326fb7f2b15bd69275f7ff9b218a01b97b27512c32c99c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5865 5292 bytes
font_01_sfnt_off00006a5f.bin
46c52fbded427f5528c31267896830f0640623007002bdac29a64c525f08584b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5F 5528 bytes
font_02_sfnt_off00007ef5.bin
e9df2a1cc62588e043336b51cf92fb10e5c226bce1f583038fc3d5e0e62162b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF5 10212 bytes
font_03_sfnt_off0000a252.bin
4132afc9504cfc9483d64706450548e3a6358214e6810ebf641ba63148515481		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA252 6700 bytes

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