Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb32aa7a67da935…

MALICIOUS

PDF

52.1 KB Created: 2020-09-17 23:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f5d8ec686a6542ab515cd2d4d55be00 SHA-1: 5c70089045fc1601d60a460fab5256a701787859 SHA-256: bcb32aa7a67da935e5e6ce2194e47dcacb8141ef84650d0b6190ee7e6ba01c99
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, 'ttraff.me', which is disguised with a lure related to 'prop bets for super bowl 2020 results'. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports a malicious intent to drive traffic to potentially harmful sites. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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.me/wix?keyword=prop+bets+for+super+bowl+2020+results
    • http://files.theraceshack205.com/uploads/1/3/0/8/130814586/8317849.pdf
    • http://waxexotab.rebeccalynnjewellery.com/uploads/1/3/1/4/131410685/najikajis.pdf
    • https://570b45ab-e842-4cc2-a852-69599bd4581c.filesusr.com/ugd/fa6f14_16474124d2eb4391a7b2a582b7bbab93.pdf?index=true
    • https://f310f583-221e-45bb-9cc4-89407a5851c4.filesusr.com/ugd/d2751c_9f83a51058ed41caa21f2e6e46e1d4ff.pdf?index=true
    • https://5214676f-21ca-4886-94ee-146b77cdd6d1.filesusr.com/ugd/227d0f_77be4fcb337247fa82774cb8af610124.pdf?index=true
    • https://4a81779e-23ba-4f1c-a811-b8f781134158.filesusr.com/ugd/48bf55_020351a9c4534ce28007d6160f1757ac.pdf?index=true
    • https://68a14c4a-20e9-481d-967b-176e262e79a1.filesusr.com/ugd/2f3ac6_62fc10729b844048aa3c23346e381bbe.pdf?index=true
    • https://36445176-4cde-44b6-9942-d8a80cbf252c.filesusr.com/ugd/a91264_08a7202485784d4b8926ba4073de0a44.pdf?index=true
    • https://13710193-07cb-49f7-b633-ce944cf89e05.filesusr.com/ugd/911c12_16eb9c6de442447294c1aafe08da3021.pdf?index=true
    • https://0518dabf-91d1-4567-bbe2-df3bd77307ed.filesusr.com/ugd/18122d_f81fe629a484471dbd6fc6ff5b6dcf7e.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/bijinazedebiruxotoradoza.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/challenges_facing_african_countries_after_independence.pdf
    • https://cdn.shopify.com/s/files/1/0446/4685/8915/files/liwewadivu.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_off00008ca3.bin
206531bf91865b33fc1c086d40956297829eefa99250ccc857face9e2f9213bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA3 5192 bytes
font_01_sfnt_off00009e73.bin
b3496dbbe3778eb36c6cd0e61abf107e54b385fb40e7818f69781730e44b52ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E73 10804 bytes

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