Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b192b20ec09ed9e…

MALICIOUS

PDF

41.4 KB Created: 2020-08-30 02:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeebd46847c5fa0b248f207dd8cb82da SHA-1: dda1c6690ce72f9968646dea4f92b42ab9aa31a2 SHA-256: 6b192b20ec09ed9e6d3c567e94a5e70232bae1d2c3c24681b1cc7fcfa5cbd159
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/wix?keyword=gerund+infinitive+listesi+ve+anlamlar%25C4%25B1, which is flagged as malicious. This suggests an attempt to redirect the user to a harmful site, likely as part of a phishing or malware distribution scheme.

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=gerund+infinitive+listesi+ve+anlamlar%25C4%25B1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/dd4472_4c1c36d6153b4b8cacfe0395e70f63d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_d67d8056b5154b03857102a7e4b00ac6.pdf
    • https://static.usrfiles.com/ugd/8b9728_027eedf18e794bf3aeb706f86d041a3e.pdf
    • https://static.usrfiles.com/ugd/868401_59c1a9f8139549cf828afaf5768a0169.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca90cdc4ee4248cb9a02fae74eff77a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_04bc38d6629049f2a9ed1c607aa7d445.pdf
    • https://static.usrfiles.com/ugd/3f80ec_595ec8d474344a7a98561a0beff5fe47.pdf
    • https://static.usrfiles.com/ugd/0df15e_9243c81e3bc84717b5e1411379aad318.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/simple_chat_application_in_android_github.pdf
    • https://cdn.shopify.com/s/files/1/0430/8792/1313/files/oxford_advanced_english_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0431/9290/9987/files/email_formale_inglese.pdf
    • https://cdn.shopify.com/s/files/1/0439/4231/4152/files/2169752794.pdf
    • https://static.usrfiles.com/ugd/585b1d_18b42784a14f466f843892b7903db01c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f97fa90c669740a3bcc3e42ca525cfbf.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_off000060d7.bin
e25a3e85b57e38627fa1be461974cfc5f08cf292996a87a437031f9222edf961
pdf-font-stream PDF embedded font (sfnt) at offset 0x60D7 5176 bytes
font_01_sfnt_off00007268.bin
6d0851909a43d24875707fdd8317d1b1b9bc93ee3a08263c7d718ed961383a2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7268 11732 bytes