Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b7582e14468dfe…

MALICIOUS

PDF

52.7 KB Created: 2020-09-02 00:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dc58288f2b59bca19f1391e5cf65955 SHA-1: 1eee0809232632b18198ed327d34c54751816e3d SHA-256: 96b7582e14468dfeafb16f5551410b56554c6ae5d68f559fe13e1d65df878d5c
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=bellamy+brothers+music', is identified as a malicious redirector. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through numerous seemingly benign links hosted on platforms like Shopify.

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=bellamy+brothers+music
    • https://cdn.shopify.com/s/files/1/0439/1396/9816/files/26723858443.pdf
    • https://cdn.shopify.com/s/files/1/0434/2041/8198/files/nositemiritatojez.pdf
    • https://cdn.shopify.com/s/files/1/0431/8412/8151/files/41157488238.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2346/files/26461896968.pdf
    • https://cdn.shopify.com/s/files/1/0437/0939/9193/files/sheetrock_lift_rental_near_me.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53293114795.pdf
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/alliance_residential_performance_manager_salary.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bafewemuwidizisaj.pdf
    • https://static.usrfiles.com/ugd/38eac1_fb6937773a354ba298fa47b00ba4b59d.pdf
    • https://static.usrfiles.com/ugd/5926b4_73fa90ec150b44d99e4053add4dffa3c.pdf
    • https://static.usrfiles.com/ugd/aff7ca_1c57e7219b9043d7b26e64b8d0f5bf90.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6c34eea607d423bbeb400693806f6c4.pdf
    • https://static.usrfiles.com/ugd/b91566_d8c1ec361ec14ea199e92a4385b403fa.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_off00009188.bin
a864f5468ecae701375b7264de90c3e47eec05c54b49820de137f294e0e6080d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9188 5328 bytes
font_01_sfnt_off0000a384.bin
2d532ee36126507043b24d7b44d7869874b629df921db47c4b7f8f9f8c68d85b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA384 10232 bytes