Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b5b34f20dd9c50…

MALICIOUS

PDF

41.3 KB Created: 2020-08-31 20:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6d65bdf33ed10cf1bcdd25cecdf99cb SHA-1: 6b75aefbb21123d416fe784f7374ae807c2d6e48 SHA-256: 82b5b34f20dd9c50aa994dcad22dfa8938e820cfbb213482b3cee18872308313
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.com/pify?keyword=greenburgh+ny+police+report'. The document body, though heavily obfuscated, appears to contain text related to a police report, suggesting a lure to trick users into visiting the malicious URL. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=greenburgh+ny+police+report
    • https://cdn.shopify.com/s/files/1/0431/9051/7917/files/church_of_the_nazarene_manual.pdf
    • https://cdn.shopify.com/s/files/1/0454/6658/3206/files/fitz_and_the_tantrums_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6472/8483/files/furnace_guide_rust.pdf
    • https://cdn.shopify.com/s/files/1/0429/3797/4950/files/kuvujodunel.pdf
    • https://static.usrfiles.com/ugd/b8c837_927c2bf494ff478d8ebdfe818e39c2e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d7f62b6f81141dda8cfe8bf027d8c86.pdf
    • https://static.usrfiles.com/ugd/b8c837_22db9b468cc1482ab96bbcebe3434921.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e4ed6d1e52349b0913d6c94bb1d105c.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0d1af00c1ee4338b3cfc7ea4d8fb1cf.pdf
    • https://static.usrfiles.com/ugd/de60da_b0b79ec0afcc47febb67635c1c53212f.pdf
    • https://static.usrfiles.com/ugd/c8a981_bfc46e4db266483782e4cf9d2cc77455.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c8e367052d142e98e7ecee29edf5100.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3412b6fb3b5451aa6a36a134e74a7df.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a6276d66f8341b9a030b75f3b7c5ef1.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_off000062e5.bin
475ce8abeb52db75b3ddba1ff4bdda4985cb4559f56ba31504d8c7ab9e031e5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x62E5 5080 bytes
font_01_sfnt_off0000743e.bin
8eadbae4ce33952f2c599b3c9ddf5efb179e409c74e4ebfc995c60064ab1a7ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x743E 10580 bytes