Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bebc567d5605489…

MALICIOUS

PDF

69.6 KB Created: 2020-08-20 05:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d61d568c9bb123bb81eaf92881d60641 SHA-1: 896c318178fdad1294277657115f1f0cc45f1652 SHA-256: 2bebc567d5605489b39cc81d834df692f215aefbe30ee26ff90189bdf803c0e7
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=asfixia+mecanica+por+sofocacion+pdf', suggesting a phishing or redirection attempt. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=asfixia+mecanica+por+sofocacion+pdf
    • http://pazum.trangallan.com/uploads/1/3/1/6/131606339/ffdb97a63608.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/the_year_of_the_cat_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/no_pity_for_a_coward_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0439/4424/7451/files/.pdf
    • https://cdn.shopify.com/s/files/1/0437/9790/5569/files/84834864653.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/apache_for_windows.pdf
    • https://cdn.shopify.com/s/files/1/0434/3391/8616/files/zigonu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7533/8389/files/xitoge.pdf
    • https://cdn.shopify.com/s/files/1/0440/1309/3029/files/pet_listening_answer_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c769.bin
4fabdf9d432f3a1e1cc1bcb8a7cc6dc2522111abf54d69fbca209ca8cfaf8db7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC769 5036 bytes
font_01_sfnt_off0000d859.bin
3b2b51e6a40abbbca1a26e6191d95427ebdce5dd67ad4a495577390437670537		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD859 10324 bytes
font_02_sfnt_off0000fb96.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB96 4324 bytes

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