Malicious PDF — malware analysis report

Static analysis result for SHA-256 8430e917d56eee9c…

MALICIOUS

PDF

70.3 KB Created: 2020-09-04 15:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e33af51ed3c6247b0c54eaab9689176b SHA-1: f6d63d0d41e39645fda3a664f5f9bf7368f0fb06 SHA-256: 8430e917d56eee9c9042b52596be0f68ce93c1993d62f2367703b23e0a54618a
154 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, which is designed to lead users to harmful content. The document body, though heavily obfuscated, contains text that appears to be a lure for a "betrayal cheat sheet". The ML classifier strongly indicates maliciousness, and the presence of embedded URLs further supports this assessment.

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.me/wix?keyword=betrayal+cheat+sheet+poe+3.+8
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_52090792789c447db2ed2b25b9c8073f.pdf
    • https://static.usrfiles.com/ugd/b8c837_12989437c7b045778bc8d97e3161f556.pdf
    • https://static.usrfiles.com/ugd/868b90_d06ea9f8f8e9430ab4c12f32895cc48c.pdf
    • https://cdn.shopify.com/s/files/1/0446/6117/8521/files/modest_mouse_third_planet.pdf
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/38608032825.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/lekezo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0153/4875/files/69858917977.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/52374311181.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/gurukafarudo.pdf
    • https://cdn.shopify.com/s/files/1/0457/3734/5180/files/aankh_maare_dj_mix.pdf
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/k1_logistics_lost_sector.pdf
    • https://static.usrfiles.com/ugd/9dda13_269fcec9c0974271a778a7cce67d162d.pdf
    • https://static.usrfiles.com/ugd/de02f3_4351751ace304dc5a5a3f857c721b816.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_off0000d681.bin
b4d9108b047f58f65d58d9534d490145f97e478ef860233eadae8bc732256831
pdf-font-stream PDF embedded font (sfnt) at offset 0xD681 5560 bytes
font_01_sfnt_off0000e96b.bin
3cb30869dc9b12d41cef2f6f02479375c86411be52035ca4f73caac0a64f2347
pdf-font-stream PDF embedded font (sfnt) at offset 0xE96B 10184 bytes