Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc139364b5b0331…

MALICIOUS

PDF

72.0 KB Created: 2020-08-26 13:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 990b64ada9bf5f1f8c2590a0293d3a42 SHA-1: 96d5212c2303c143598d22adf5eaabc04585961a SHA-256: 6bc139364b5b03313b302ac712ab6631e4013f919c9ddd48baa5bb449678f008
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. It also exhibits a PDF link farm heuristic, suggesting an attempt to manipulate search engine results or host numerous malicious links. The embedded URLs, particularly the one pointing to 'ttraff.cc', are highly suspicious and likely lead to further malicious content or phishing pages.

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.cc/pify?keyword=aprender+como+aprender+rosa+maria+ga
    • http://pimatef.tedhowe.com/uploads/1/3/2/6/132681488/6478037.pdf
    • http://xeket.litupmymind.com/uploads/1/3/0/8/130874153/120412.pdf
    • http://vuzuliloz.sacredcirclecounseling.com/uploads/1/3/0/7/130738902/mesaturoripuwunugak.pdf
    • http://files.mrmark.co.uk/uploads/1/3/0/7/130739533/686feec1f1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/usps_international_customs_declaration_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/google_academico_libros_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0445/6503/7220/files/equilibrium_constant_and_reaction_quotient_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0463/3070/8125/files/jutekonorupon.pdf
    • https://cdn.shopify.com/s/files/1/0463/6649/0779/files/ad_blocker_firefox_free_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/1905/9868/files/arthritis_deformans.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6568/files/2411432895.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/lirego.pdf
    • https://cdn.shopify.com/s/files/1/0446/6851/8563/files/sodium_carbonate_msds.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be7c.bin
d440fc55d307a8aaef9fb83730bd371db88912214d2976600f6a71c3ad918d9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE7C 5352 bytes
font_01_sfnt_off0000d082.bin
8b36c3a3f18b9871cf5927a43e8d5fe53dd3bd1808702a2b4519fc993290a1a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD082 13616 bytes
font_02_sfnt_off0000f8e3.bin
00cef1c3be3bfc0c389fb693c7fc6e2bbc6340c832d556a9436dc4a30841531b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E3 17064 bytes

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