Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9de2f78260425b…

MALICIOUS

PDF

45.0 KB Created: 2020-08-29 20:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65cbc18d064582855a0a1cb36fbcccd3 SHA-1: ecbd063e8c83fe021bd0f41c4b73c7eaaefaec56 SHA-256: 0d9de2f78260425b46ef77a83654c26487a359b1fb4c7cf32a793c98e308b9b2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.cc, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF documents, suggesting a link farm or redirection 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.cc/wix?keyword=the+comedians+graham+greene
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/40512e_b734596211104b69b3c0dbe85a796d05.pdf
    • https://static.usrfiles.com/ugd/b8c837_46a55330e7064069b522c10be6581866.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbf61614925c45b59beeea5a0c209236.pdf
    • https://static.usrfiles.com/ugd/b8c837_455e295a74104e64b1b901251d27e431.pdf
    • https://static.usrfiles.com/ugd/b8c837_91e4cd5f6e8c49ab92b060318affabda.pdf
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/delhi_building_bye_laws_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/aperturas_de_ajedrez_libro.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/79993718931.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6438/files/kavegiroguguxizubuma.pdf
    • https://static.usrfiles.com/ugd/d2751c_d46b1f0666ed4f928be37a4823bf657f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d42d25c9b49e4e99b857bf4018648e8b.pdf
    • https://static.usrfiles.com/ugd/b8c837_da0e981594ba4776892747714e25d664.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcc0cc1e0227497490770403dbc9ede9.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bf834038ac2425ab653fe22675e28e1.pdf
    • https://static.usrfiles.com/ugd/40512e_4f3504d5a7a448ddb517feb9a2a468f6.pdf
    • https://static.usrfiles.com/ugd/353d00_97cb77c5fed14796824658e4a4eb53da.pdf
    • https://static.usrfiles.com/ugd/1a89c8_3b5a3ea86d6c4c38a8ffe7b2e2d3ec99.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_off000072ff.bin
8d1c99481c0a2031beec47516e92803db30fc7b1c3bd730a7f7980c3a59a2281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FF 5272 bytes
font_01_sfnt_off000084bb.bin
2510ee035373cb9f01a0ed5c3371c7bfc2e065556fc675213af6e92c05aca276		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84BB 10088 bytes

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