Malicious PDF — malware analysis report

Static analysis result for SHA-256 3619205fd984ef73…

MALICIOUS

PDF

40.4 KB Created: 2020-09-02 06:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce7d60b47ca0e3d06b210a7659274672 SHA-1: 4e7b9f22836f17e988c0169472209e988cd71071 SHA-256: 3619205fd984ef732389bcee0605593ad516d6ab5fed278871ccfe48be238c66
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a mass external link farm, with a primary malicious redirector URL pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this URL and other links to Shopify and static.usrfiles.com, suggesting a lure to external content. The ML classifier strongly indicates maliciousness, supporting the attack pattern of a link-based lure.

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=tamil+old+movies++website+list
    • https://cdn.shopify.com/s/files/1/0434/7772/9430/files/amu_b_tech_syllabus_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/free_template_for_drawing_house_plans.pdf
    • https://cdn.shopify.com/s/files/1/0447/1455/7596/files/libevorotox.pdf
    • https://cdn.shopify.com/s/files/1/0428/3170/8316/files/21286514554.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/brastemp_inverse_max_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/lelopuzalidep.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/99006285525.pdf
    • https://static.usrfiles.com/ugd/e5a943_f85cd21aa94c4610ac0061cf87d2da74.pdf
    • https://static.usrfiles.com/ugd/b28ae2_c4470351e81b4a278ab3effb79c29177.pdf
    • https://static.usrfiles.com/ugd/3be3a7_3f4cbdd780ec4654af45cd1af46c8ca3.pdf
    • https://static.usrfiles.com/ugd/b8c837_a92775fc629d4b208f11de6e92dc3dbe.pdf
    • https://static.usrfiles.com/ugd/b8c837_854749b94cf34baca9ab932ae6fd90a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a6ec84b551244b7a8abb88feec3d9f0.pdf
    • https://static.usrfiles.com/ugd/abd6ea_b616c1dbc51b4eaab510c21b37cca401.pdf
    • https://static.usrfiles.com/ugd/05900a_915c435854024035aa33d27c64442101.pdf
    • https://static.usrfiles.com/ugd/b8c837_3edc7497a387403b9bba10a9cfa8e913.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_off0000610b.bin
ebe664378353033b47008bd2ac0712a003c9254be881ab7df76aa6211e7e5679
pdf-font-stream PDF embedded font (sfnt) at offset 0x610B 5116 bytes
font_01_sfnt_off00007271.bin
ea0e34e3e864d6c5112659f686c1412910251b0f0aea015adc37e9650c134c92
pdf-font-stream PDF embedded font (sfnt) at offset 0x7271 10060 bytes