Malicious PDF — malware analysis report

Static analysis result for SHA-256 8860a7377f25461f…

MALICIOUS

PDF

45.9 KB Created: 2020-08-30 14:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e481fa643f10088d55d1a3e6622a39e SHA-1: b50a3aa33fd6abd9ab2d25c64212ab4e442645e5 SHA-256: 8860a7377f25461fa4cec311a21209a8af9c9968e1a9295cb42ac6a18c57fb60
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is `https://ttraff.com/wix?keyword=my+time+at+portia+gust`, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains metadata suggesting it was generated by `wkhtmltopdf` and includes the malicious URL. The presence of numerous links, including one to a known malicious redirector, strongly suggests an attempt to direct users to malicious 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.com/wix?keyword=my+time+at+portia+gust
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_274c44d837e4401d9b06677bc2433ca2.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_24cc854ecc974c14b24aafd106678ef7.pdf
    • https://static.usrfiles.com/ugd/0c4177_40044156731941fbad068ef2dcae41e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e552a6c1f93481cbe7628d07a5771c6.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_9932266eb03b4deaa42f0d28c9bb53bc.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_bd4bb51a15e84aeeb0bc780a1c416440.pdf
    • https://static.usrfiles.com/ugd/b8c837_331ad7e87edc4c14a3869fe8a9245b56.pdf
    • https://static.usrfiles.com/ugd/cf79db_a62faeb3f5c149ad8b508c54b348234f.pdf
    • https://static.usrfiles.com/ugd/b8c837_308bbcb111da4e6ebd05f5c33c41ef21.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc9fbe74a5f4431db8ba452051342171.pdf
    • https://static.usrfiles.com/ugd/3f4b99_d46f3430730a432abd66fbddebea17ab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63016720996.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0619/files/guporizujiru.pdf
    • https://cdn.shopify.com/s/files/1/0428/0044/7655/files/9713175893.pdf
    • https://cdn.shopify.com/s/files/1/0434/4715/6903/files/tukelulipulud.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/46057054715.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_off0000760b.bin
18632909033cb59d2a2c62bcb9a749f65f9c686fb71822f80f090866c55ec42a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760B 5212 bytes
font_01_sfnt_off000087ba.bin
3f8a6e9f1b39ac4e29c573c3f10de06768f503615cbbd72b825e6c5d4ca99b1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87BA 10360 bytes

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