Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b609e6288c6818…

MALICIOUS

PDF

73.9 KB Created: 2020-09-04 23:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12318d5b9295e43b280a0c852f8ee59b SHA-1: 7a6a8385a079d96156c947d9d2a09b2ef09eed03 SHA-256: f0b609e6288c681837364f085cfbbd23124fdf5ccbcba3b7436d8427a4235580
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.club'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links, with 'cdn.shopify.com' being a dominant host. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ttraff.club/wix?keyword=isaac+physics+b5+moments+answers', likely serves as the primary lure, redirecting users to a malicious site.

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=isaac+physics+b5+moments+answers
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/83931328901.pdf
    • https://cdn.shopify.com/s/files/1/0434/7287/9773/files/nutrio_animal_andriguetto_comprar.pdf
    • https://cdn.shopify.com/s/files/1/0441/0019/0360/files/carols_for_choirs_1.pdf
    • https://static.usrfiles.com/ugd/1813b3_ef17675b874847c8b3a85b24a6002862.pdf
    • https://static.usrfiles.com/ugd/b8c837_684aa52f1b41443ca46dc2677abb7ac2.pdf
    • https://cdn.shopify.com/s/files/1/0437/6533/4165/files/jurarajusopimogufavam.pdf
    • https://cdn.shopify.com/s/files/1/0440/5726/4280/files/dadeladomilufolubagewetev.pdf
    • https://cdn.shopify.com/s/files/1/0438/1884/4322/files/gubijekezodedunepububupas.pdf
    • https://static.usrfiles.com/ugd/12f4eb_de7da0259f6b45cd81157442916dcc4c.pdf
    • https://static.usrfiles.com/ugd/cfa91a_ac49ba2db29f4691959642a5b47d3bf4.pdf
    • https://static.usrfiles.com/ugd/576447_fbdddcc379584cb39326d812016ce806.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_off0000e1a3.bin
4455274ad16c96a2378bcd81c1bbecd112e3858f10c885138341288b98089245
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A3 5536 bytes
font_01_sfnt_off0000f461.bin
9e92584c81b0651d365d901725e2337422e28a2b3a0147691356afa9022b8104
pdf-font-stream PDF embedded font (sfnt) at offset 0xF461 11236 bytes