Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b9690743a1d44e…

MALICIOUS

PDF

71.2 KB Created: 2020-09-01 04:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d697356fd12a7d81c0d7c6eaf098798 SHA-1: 8b477b56e780cbc3881e42298e562b37739f29be SHA-256: 70b9690743a1d44e3cdda58bd1342cbaa72806618f9c00a47b9695193c3257a5
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious content. The document also features a large number of external PDF links, suggesting a link farm or SEO manipulation tactic to increase visibility. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to harmful content.

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/wix?keyword=breast+cancer+esmo+guidelines
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3882/6908/files/woseretejawovefamex.pdf
    • https://cdn.shopify.com/s/files/1/0447/4303/2983/files/muis_ramadan_calendar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/deep_learning_andrew_ng.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/formato_acta_de_nacimiento_mexico_en_blanco.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/33038445271.pdf
    • https://cdn.shopify.com/s/files/1/0434/7081/5397/files/davojabuvupatafabeta.pdf
    • https://cdn.shopify.com/s/files/1/0447/5482/9463/files/19221220025.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/diposabuvanewebozoxor.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/xulotiwevozosabozibe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/xarurexa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/17851151337.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/49720350289.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/dallas_cowboys_images_free_s.pdf
    • https://static.usrfiles.com/ugd/6da380_ef57efbab68540dba549f3abc33b9ff7.pdf
    • https://static.usrfiles.com/ugd/ac72e0_fa04e27cb29447e98314c85d645505db.pdf
    • https://static.usrfiles.com/ugd/a58b01_f7d2ad80168a4d4284b917d15ca16e6c.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_off0000db4d.bin
cb03e6d3142cccb5957de518fcdacb85992f1fcdea982be6cb6e99d911df6a0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4D 5308 bytes
font_01_sfnt_off0000ed3a.bin
ac9cf8148f1bf41c22a2efea474f39057346123548356fad465f28181d44834e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED3A 10144 bytes

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