Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e3dac3bf100cbf…

MALICIOUS

PDF

71.8 KB Created: 2020-08-11 08:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bfcec6c59592bb47c2c5ebbb780691c SHA-1: 8c91170db6564fb28d8bc30d1b087ffaece0d464 SHA-256: 17e3dac3bf100cbf6bd17bea245fc3a77df74e96e13f982d9b2d8e51cedd4657
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.com', which is used in conjunction with a keyword search for 'sound pollution information in marathi language pdf file download'. This indicates a phishing or scam attempt to drive traffic to malicious sites. No scripts were extracted, but the presence of numerous links and the ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=sound+pollution+information+in+marathi+language+pdf+file+download
    • http://files.apharwat.net/uploads/1/3/1/6/131606268/nosokuwus-newamovebonu-ruzafoke.pdf
    • http://dopir.myguttellsme.com/uploads/1/3/1/6/131637136/4781f65.pdf
    • http://tewaparob.elliotcoxracing.com/uploads/1/3/2/8/132815176/ximaja.pdf
    • http://texav.cammcdonaldphoto.com/uploads/1/3/0/8/130874493/dadiferixux_ladajokol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/2907/5880/files/nba_team_names.pdf
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/zuzaxopu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0530/3190/files/mizejusajive.pdf
    • https://cdn.shopify.com/s/files/1/0429/0658/3203/files/xabezoxitadip.pdf
    • https://cdn.shopify.com/s/files/1/0435/3182/9412/files/46162837219.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/vasugaxexiviwov.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/59794681963.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/5457012243.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/95355228638.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6256/files/zozuxulake.pdf
    • https://cdn.shopify.com/s/files/1/0437/5409/4743/files/14819267099.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6262/files/88448244412.pdf
    • https://cdn.shopify.com/s/files/1/0438/9653/7243/files/analog_integrated_circuit_design_2nd_edition.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d158.bin
570fd41b6b5e540d03f9caaf8897e38d16977f618c79e4e875f9c4fee802e950		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD158 5472 bytes
font_01_sfnt_off0000e3da.bin
50e5689404b991997a3c4b265ba2d94938e2bfbe0616738fa2cbad83948772b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DA 14536 bytes

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