Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe6db35682466e3…

MALICIOUS

PDF

39.8 KB Created: 2020-08-06 21:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0818eeb5cff901836ea582548cfde56f SHA-1: da2727988a36f6c03bca9f50c834cca615f3b63c SHA-256: bbe6db35682466e3fb14298cd8f1e3dbeba48eb8fe92530545194fda08fb5aa0
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=aulad+ki+tarbiyat+urdu+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and other benign-looking Shopify URLs, suggesting a lure to disguise the malicious redirect.

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.ru/pify?keyword=aulad+ki+tarbiyat+urdu+pdf
    • http://files.cornerstone-civil.com/uploads/1/3/1/1/131164239/luromosinigobabeb.pdf
    • http://files.code67.ca/uploads/1/3/0/8/130814192/8336429.pdf
    • http://files.juliewilder.net/uploads/1/3/0/7/130775758/famesagisulali.pdf
    • http://files.myptsdveteran.com/uploads/1/3/1/3/131398360/4ece218d.pdf
    • http://files.musictheatercareers.com/uploads/1/3/1/4/131407944/667347.pdf
    • https://cdn.shopify.com/s/files/1/0434/3513/1046/files/54555665631.pdf
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/advanced_mathematical_concepts_resource_masters.pdf
    • https://cdn.shopify.com/s/files/1/0439/1262/6344/files/brazzers_free_account.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/11349249536.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/rerebakimarose.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/infinitive_and_bare_infinitive_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/national_design_specification_for_wood_construction.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/kevuzuxiwij.pdf
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/71121306313.pdf
    • https://cdn.shopify.com/s/files/1/0439/0964/4456/files/historia_de_la_administracion_resumen.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/38056319884.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9094/files/discord_format_code.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4601/files/94852135121.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_off00005e5c.bin
3e385ec6e8d264ccf1dfe8684f13b4d979559fb9c43ac7d6e6dffee10a95041d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5C 5152 bytes
font_01_sfnt_off00006ff8.bin
7b2bc63fc23cd8e4ac72b4542a2a1af9d53bccdb11dda4e86f6777f5710c61f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF8 9864 bytes

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