Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ea8ced6041ef47…

MALICIOUS

PDF

41.7 KB Created: 2020-08-31 10:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2391b9bbcf557b8b4b5f5cc7b94a6652 SHA-1: d1d8f195c5e6c60c24ef1cca956347a75bb47106 SHA-256: 11ea8ced6041ef47ef03562bd5a139640d48460a0a6abcce74b1d96ebe004102
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and contains a significant number of embedded links. One of these links, 'https://ttraff.ru/wix?keyword=walther+p99+airsoft+uk', points to known malicious redirector infrastructure. The document appears to be a link farm, likely intended to lure users to malicious sites or distribute further payloads.

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=walther+p99+airsoft+uk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1864/8732/files/2578404242.pdf
    • https://cdn.shopify.com/s/files/1/0445/6457/8463/files/castrol_lmx_li_komplexfett.pdf
    • https://cdn.shopify.com/s/files/1/0431/5211/3820/files/2580654256.pdf
    • https://cdn.shopify.com/s/files/1/0440/0198/4662/files/hungry_shark_world_apk_android_day.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/33374625424.pdf
    • https://static.usrfiles.com/ugd/b8c837_5be36ac1631b4b15bfdcc26c2d20537c.pdf
    • https://static.usrfiles.com/ugd/1813b3_bb54cb2c08c2427dbcf1970408bb3e82.pdf
    • https://static.usrfiles.com/ugd/e643da_1a78cb2c3d5445eeb011847bc6facc36.pdf
    • https://static.usrfiles.com/ugd/f84671_b9cf160fbc574b69b8b0a034962bda06.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed426657fc0c469bba22da7019b26597.pdf
    • https://static.usrfiles.com/ugd/b8c837_649517d3e2b14ba1816d4229783b3e13.pdf
    • https://static.usrfiles.com/ugd/a382ee_ca5089fdb2344d85b369d13815fedac4.pdf
    • https://static.usrfiles.com/ugd/804ff6_d2d0b1eb40f94f648ebf978ee551af92.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_off00006340.bin
d4d4e31a10b33fc195334359d19a75eba759d3fee0547011c1cfd84787344bdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6340 5220 bytes
font_01_sfnt_off0000750e.bin
fa1606d4a32276d0c7bbc13a0e7f3253fffc816abd797ee82548cb5aa88b2a01
pdf-font-stream PDF embedded font (sfnt) at offset 0x750E 11104 bytes