Malicious PDF — malware analysis report

Static analysis result for SHA-256 119088a8dd5bbbff…

MALICIOUS

PDF

44.3 KB Created: 2020-08-30 09:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d124e825e7767e4933326251470b2a3c SHA-1: 87688a7bb7421fa253010d393a61ae1c3cfa919d SHA-256: 119088a8dd5bbbff1fa4935fb5dbf6db7704ac75fc9f29736ad7e3c90b4e03f9
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary redirector URL identified is https://ttraff.ru/wix?keyword=osman+ya%25C5%259Far+yolda%25C5%259Fcan. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to direct users to malicious content, likely as part of a phishing or scam campaign.

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=osman+ya%25C5%259Far+yolda%25C5%259Fcan
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/5d2cf3_d618491158704618ba5ba8609b941b48.pdf
    • https://static.usrfiles.com/ugd/b8c837_d920c46c2f204f7398cc97e4174d14d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4b04af9a61a4a1baa7d41cb89037e9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_de221f358af14cefb7bdd19a92485e94.pdf
    • https://static.usrfiles.com/ugd/c068f8_d2e95c620fe84853abfe39b419223856.pdf
    • https://static.usrfiles.com/ugd/b8c837_3747a899bcf04340a272ee1d411db89a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c47477d0a47479489360f4e2d25dbbc.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffb3c0af041040bc9a71bebce3e967af.pdf
    • https://static.usrfiles.com/ugd/55cc32_81307e75948946c2a9f264596358dadd.pdf
    • https://static.usrfiles.com/ugd/271e65_b678db2ae8ba459aa52d10886dc22364.pdf
    • https://static.usrfiles.com/ugd/f09a9d_649982c8e9ec4501b76f5f6d3d7e1d96.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8f4b5d7e0f44f5d9e1bf8966aa89c57.pdf
    • https://static.usrfiles.com/ugd/80c1db_0502b21f0eb84e8f8619c0b4e08a54c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_90e518543667433cbb1d34ab83fc318a.pdf
    • https://static.usrfiles.com/ugd/0df15e_47c99e09ea8e44d69e24d09ff2560c08.pdf
    • https://static.usrfiles.com/ugd/f1780b_d8b76ef81af0437ba6226f8c51fd5cc6.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ab38440706a40fbb0be0d4e8ba6110b.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_off00006bef.bin
2fdd221e9f972b211a004c71a0aed8637284dd91f44b49512b51137bf8887258		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEF 5460 bytes
font_01_sfnt_off00007de4.bin
11bb2261db5836bd7f109bfadeaf002452a4023ea5ea9d2fe7cd7bacc2d3918b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE4 11636 bytes

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