Malicious PDF — malware analysis report

Static analysis result for SHA-256 092ba3b8d25b6c9c…

MALICIOUS

PDF

43.3 KB Created: 2020-08-31 01:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96c2f4092bc5cf9c75513c0fc44b8823 SHA-1: 72ff6102b1bd735492658a7f6672f378656f9f70 SHA-256: 092ba3b8d25b6c9cf3bc477754fdd3f4ab629c72f790e41cc2c9b9eec7ea9715
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.ru/wix?keyword=biblia+de+jerusalen+nuevo+testamento+pdf`. It also exhibits characteristics of a PDF SEO link farm, embedding numerous links to other PDF files, many hosted on Shopify. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to disguise malicious content as legitimate document links. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly indicate a phishing or redirection attempt.

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=biblia+de+jerusalen+nuevo+testamento+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/17673888067.pdf
    • https://cdn.shopify.com/s/files/1/0434/3064/1826/files/vovamowurujigesalajobis.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6264/files/17301596198.pdf
    • https://cdn.shopify.com/s/files/1/0459/7288/1575/files/accedere_a_gmail_da_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdf
    • https://static.usrfiles.com/ugd/d55797_9c17b0803e8f4a91868012030bba3aef.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/types_of_jedi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/gaketujegez.pdf
    • https://cdn.shopify.com/s/files/1/0434/1606/0061/files/89721088403.pdf
    • https://cdn.shopify.com/s/files/1/0430/0367/4785/files/80269125432.pdf
    • https://cdn.shopify.com/s/files/1/0431/7682/0890/files/wuxuboxufubevus.pdf
    • https://cdn.shopify.com/s/files/1/0429/5727/5299/files/49449210111.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/minepi.pdf
    • https://cdn.shopify.com/s/files/1/0439/2534/0328/files/borderlands_3_cutscene_skip.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bb7.bin
a4759a716b081771fd9b21319ab96c0a10c79511ffea07172a7d47671ff8b589		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB7 5512 bytes
font_01_sfnt_off00006e52.bin
17f9a2a1e1d19a7f82f2be5d890002f76a1992ef943615531b54ed789a5f0f1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E52 4380 bytes
font_02_sfnt_off00007a64.bin
1c87f75f6bddd557e28c615dea81f7073bca396a36565f0f92285f9977204b30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A64 10964 bytes

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