Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7f747728e2132d…

MALICIOUS

PDF

33.8 KB Created: 2020-08-31 05:32:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd741644a2d12ebe8b55f429b79cc268 SHA-1: 283a2ed7209e7e5875a8658dce43ab9cf878d256 SHA-256: be7f747728e2132d059e490d35abe850a78120bd321caffd09147ea6e6146966
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 ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to static.usrfiles.com. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring the user to a potentially malicious site via the embedded link.

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.com/wix?keyword=pioneer+sx-2300+user+manual
    • https://static.usrfiles.com/ugd/29c71c_57115a7189f4493a985209256e3fdc11.pdf
    • https://static.usrfiles.com/ugd/628a76_47c4d7aa73a545fc96b997d124ce1087.pdf
    • https://static.usrfiles.com/ugd/97493d_4654227daf924e40a58e6b82a181a65d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a09ddbb188c44881a8a6ffc2f87c92af.pdf
    • https://static.usrfiles.com/ugd/d902bb_a996997332ec40f69d0c535334a02306.pdf
    • https://static.usrfiles.com/ugd/b8c837_269a0ae271c24819a837d7c986639da6.pdf
    • https://static.usrfiles.com/ugd/b8c837_69b7f69f54454e3f9f877e93227c4a94.pdf
    • https://static.usrfiles.com/ugd/63d3ad_01ba744676a049018f9905ba63129b2e.pdf
    • https://static.usrfiles.com/ugd/e6092c_27d10efde0fa4373abffae4f219df86f.pdf
    • https://static.usrfiles.com/ugd/41a0b6_9f0097c7775c457db569fe35ce46d62e.pdf
    • https://cdn.shopify.com/s/files/1/0449/6785/4248/files/fanupizafulos.pdf
    • https://cdn.shopify.com/s/files/1/0440/6837/2632/files/24460851799.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_off0000469a.bin
ba63d72a8772e69b6c051826613c38fcad08e5f27dc6c0773b407f12435b4e52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x469A 5372 bytes
font_01_sfnt_off000058c7.bin
1d654504b65dd845ba021166ea833c75c76bc540a3139a254ca6bc238d2b9e2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58C7 9900 bytes

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