Malicious PDF — malware analysis report

Static analysis result for SHA-256 aedeb1539ef6cdab…

MALICIOUS

PDF

49.8 KB Created: 2020-08-29 23:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e36f9d9771ce8a6cc631ba9a9e203d9 SHA-1: f66f2f72d966787bdf62c56232e6cd3359800ae2 SHA-256: aedeb1539ef6cdab137d5c0bc0bc95afb652d4dffcf36b62fd8ef4984e270b30
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One of these links, https://ttraff.cc/wix?keyword=firebreather+movie+full, points to a known malicious redirector. The presence of a link farm suggests an attempt to distribute malicious content or phish users.

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=firebreather+movie+full
    • https://static.usrfiles.com/ugd/b8c837_e3438c9ce42e43fda0f973d6262c13d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a24bd9f1bc7496996d93b0c6e9612e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_77423b678dbf485db83b0fe0f931bae7.pdf
    • https://static.usrfiles.com/ugd/b8c837_d15b243ac0b94e89b68fc01888e4e9ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ee4782d110e4c19bf7a7e7c01607845.pdf
    • https://cdn.shopify.com/s/files/1/0444/4412/3303/files/animaciones_en_flash.pdf
    • https://cdn.shopify.com/s/files/1/0434/1130/8696/files/90794048548.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2738/files/foxit_reader_free_download_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0428/9983/2995/files/xefexezi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nelafujadodejofit.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/ximesiko.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/maniw.pdf
    • https://cdn.shopify.com/s/files/1/0454/3050/5628/files/kipifadolis.pdf
    • https://cdn.shopify.com/s/files/1/0428/4032/6300/files/76047313908.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3333/files/93751449347.pdf
    • https://static.usrfiles.com/ugd/b8c837_43554f5a9baa44ce93ba3a9b8d3bfc90.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c88fd91eb284196bf4a88e69f2587c6.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_off000078c8.bin
bf034b456f5bcf74274537782fe649d2091e780cb39a0787d187f2c952811124
pdf-font-stream PDF embedded font (sfnt) at offset 0x78C8 4984 bytes
font_01_sfnt_off0000899e.bin
2f19685e0c70c85e3906c08be9e239f16fb118b8de92841d728f1121d2a93b7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x899E 15628 bytes