Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b98747e047da40…

MALICIOUS

PDF

43.7 KB Created: 2020-08-31 05:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce7dab4fe86140c935457d29bbf0f6ed SHA-1: 7a016eed0f2501ab6f57728f5d696f6f52fcd14c SHA-256: e4b98747e047da40be2d68fbc5dece238da82e2bd14558fda04f1eae331bcce9
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, likely as part of a phishing or scam campaign. The document body and embedded URLs suggest a lure related to software serial numbers, aiming to trick users into visiting the malicious site. The ML classifier also strongly indicated maliciousness.

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.ru/wix?keyword=premiere+pro+cs6+serial+number
    • https://static.usrfiles.com/ugd/ce14f3_dabe8fd9122d4f5bbd8a51436c862486.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_99d24f37c19c44e09fa7e163c4da7376.pdf
    • https://static.usrfiles.com/ugd/0baf77_77e2d7a69f34437c985300bf3286c107.pdf
    • https://static.usrfiles.com/ugd/b8c837_b12b74ad28444633985ce1672be97810.pdf
    • https://static.usrfiles.com/ugd/e4a001_13b13424775845f2a98930354a6be1c9.pdf
    • https://static.usrfiles.com/ugd/e02969_db3c16375306455585f9483b74fca16d.pdf
    • https://static.usrfiles.com/ugd/b11f6d_dee269997946453b8bb32c94f11728f0.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_d0feed72ff34447eb6d111fd5b3b0bdf.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f15cece40b245d68ae428b28317248d.pdf
    • https://static.usrfiles.com/ugd/b8c837_4fafe1556de04878b0877aa3f90d2071.pdf
    • https://static.usrfiles.com/ugd/ce14f3_5afdd3858a2c468194ef3dbdb40caf3b.pdf
    • https://static.usrfiles.com/ugd/0779a3_2d94c6c5eae44ac9b7eee896d77092d8.pdf
    • https://static.usrfiles.com/ugd/c83fdb_f3d1de285ed94f778d9e78edaf45f7cb.pdf
    • https://static.usrfiles.com/ugd/d01287_32e07f64fcdb41faa7df0be7f04ae3cc.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_a3361745c76c449d87193c2de8b6d59d.pdf
    • https://static.usrfiles.com/ugd/850f07_5a515c3a194c4899973d3571f6305c43.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_off0000652b.bin
f83c34a1ca6323fe6bf18a18b4d5e1b5938a63659f0eb5464ab8290180b7f7c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x652B 5372 bytes
font_01_sfnt_off00007747.bin
cc5f40a3f8c459646323111310c9ecc0006c0b67f7866cec7fa83d377bd6f029
pdf-font-stream PDF embedded font (sfnt) at offset 0x7747 13252 bytes