Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfd497e72c4eb63…

MALICIOUS

PDF

35.6 KB Created: 2020-09-06 11:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12cd26e112cb1363cf0c9476d61e2687 SHA-1: 37dc70cd285e250f4386ed5c3080d80073636a0a SHA-256: abfd497e72c4eb63bcea3068051cf9707a69c12923c301bda52b06be809eb585
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a movie title lure. The document body and embedded URLs indicate a link farm strategy, likely to obscure the final malicious destination. The ML classifier strongly flagged this PDF as malicious.

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.club/wix?keyword=chello+divas+2+gujarati+full+movie
    • https://static.usrfiles.com/ugd/18574e_57d13816edad463c9486b0d1679190b4.pdf
    • https://static.usrfiles.com/ugd/60933b_3686cd1cf0134f6f9c64b18fdebfa2f5.pdf
    • https://static.usrfiles.com/ugd/f4de5e_0876e23fe892479c8f38ab35db340f23.pdf
    • https://static.usrfiles.com/ugd/9421c8_f7c93878cd2a4e2b8a2b57448c3e95e9.pdf
    • https://static.usrfiles.com/ugd/79e5df_e325080e4147494a9382e92101dedd29.pdf
    • https://static.usrfiles.com/ugd/cdb50c_5db38dbfab1840ce9e137e64292f8dd6.pdf
    • https://static.usrfiles.com/ugd/b0c8dc_690dbb24cd084ca3a6bf321beced6d8c.pdf
    • https://static.usrfiles.com/ugd/cd79e3_d01d452c04c24184b44e99ea076f8ffe.pdf
    • https://static.usrfiles.com/ugd/6fd45c_13e9293263344d34be7831a9d51e63ba.pdf
    • https://cdn.shopify.com/s/files/1/0434/5944/4889/files/bijowasokiwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/eurosport_2_uk_guide.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_off00004cc4.bin
0d4f46fe4dec7f2c3c04fa45293dc3c25cbd9f3f9d3f00499640d62525230aa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CC4 5492 bytes
font_01_sfnt_off00005f54.bin
644209ed22b9622f6b1db7b373a45851f6809d17cf60e53f7b8e512b4499e4d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F54 10172 bytes

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