Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e28eaf5062363b…

MALICIOUS

PDF

40.5 KB Created: 2020-08-31 01:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 888d5e10de8e264c93d4139fce903e36 SHA-1: 484a138dd525b9eda9bafc1076280ad906b21e54 SHA-256: 15e28eaf5062363b2e8aba2d2f219bccd3c4ec072c65b8e048d35fc83c52cc1a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/wix?keyword=stuart+mcgill+ultimate+back+fitness, suggesting a lure to external content. The presence of multiple PDF links and the ML classifier's high confidence indicate malicious intent, likely to redirect users to malicious sites or phishing pages.

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=stuart+mcgill+ultimate+back+fitness
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0ebc1f_22b61a1dcf5b408cbab57fe4b67b16c7.pdf
    • https://static.usrfiles.com/ugd/73c254_92271da414c141ab9312af053b0be03b.pdf
    • https://static.usrfiles.com/ugd/38eac1_23504de984fe4f1e908c224471cbcc90.pdf
    • https://static.usrfiles.com/ugd/b8c837_d53f25203c664e2d87a60a0e03a0d159.pdf
    • https://static.usrfiles.com/ugd/f0e51d_9a1493720c514fe5b543bcc9352eabef.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/28843787356.pdf
    • https://static.usrfiles.com/ugd/b8c837_f75b23fbad844766aab148001af2463e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3eeb3ced771494d89cdb5f217548af8.pdf
    • https://static.usrfiles.com/ugd/63d3ad_72bf4920cb4e47ce86dc2a2971a2b19f.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_06b9e4989ebf4bf79b2c283a421df016.pdf
    • https://static.usrfiles.com/ugd/99afdc_f399e885757e4fa58170941140b53f68.pdf
    • https://static.usrfiles.com/ugd/0d2908_15e1eca5aff2462cbcca67d613dcaff9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5518410e21c4054ba0c238592076d4a.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060f2.bin
f9601c18d2fa7ea1d18b933bd76723ed41be3ec533525fc02ede3db15c68ecaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F2 5508 bytes
font_01_sfnt_off0000738d.bin
b7d04e7ccd4f628126937244c04e2205cfe70db2a8124ec7312bb944b842fa43
pdf-font-stream PDF embedded font (sfnt) at offset 0x738D 9916 bytes