Malicious PDF — malware analysis report

Static analysis result for SHA-256 f03ba1dc0a785f23…

MALICIOUS

PDF

43.1 KB Created: 2020-08-29 10:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3472dd06af4b997e9cf3b3d202773a81 SHA-1: dddb8580a3f7e11d2e52629e36e064070df74123 SHA-256: f03ba1dc0a785f2368ccd6f049cecc87af8a09704a31d09ad4618e3345d561c4
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious link, 'https://ttraff.com/wix?keyword=sarah+jessie+test+ride', is flagged as a redirector to malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the malicious URL and references to other PDF files, suggesting a coordinated effort to distribute 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=sarah+jessie+test+ride
    • https://static.usrfiles.com/ugd/b8c837_b5e20af8452c416ebbd5ff8dbaa83864.pdf
    • https://static.usrfiles.com/ugd/b8c837_abb20bad16374a96ba6a072e9a25c470.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba3326000c4c431b9463f4676d64e347.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c266b54b4b447ba8891eae0752843d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e116894d6184ac1bfd4b3303e2beaed.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/98941935998.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/76277106310.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2116/files/cuantas_diagonales_tiene_un_heptagono.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/65115153331.pdf
    • https://cdn.shopify.com/s/files/1/0459/7547/0247/files/digital_camera_raw_formats_supported_by_sierra.pdf
    • https://static.usrfiles.com/ugd/b8c837_58cefc3aef284e358fb09f3a1017fe3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_477a2f7ce58d46349de1f9bbf83a2e81.pdf
    • https://static.usrfiles.com/ugd/b8c837_55d3f6d278d84667b42ec3c2829b52a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_1816ed7f36b240ccacc5e447da034b88.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a69c0444e8e4064b6760d3e758a1e9c.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_off00005fbc.bin
e677bb5d04f98970e54fdb10166043736feab270d4e1d867dc1323c2f4bb4532
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBC 5060 bytes
font_01_sfnt_off000070e9.bin
9bf6bb2cd4a1c5da5d2d3a358f4fde222a92d546709f5e337eda588ca1a1cd1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x70E9 14976 bytes