Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca2e2265ee05505…

MALICIOUS

PDF

35.5 KB Created: 2020-09-03 08:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c37fba02deaf27d2f7f908e7f4f73160 SHA-1: 07ed5437eedb9f4807dbe2f31ece22507812c893 SHA-256: 6ca2e2265ee055059c39add92e14d15932be19a0f95c8a1fa62f4593bc1b0d76
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL https://ttraff.club/wix?keyword=castle+crashers++pc+2018 is a clear indicator of a phishing or scam attempt, likely aiming to deliver a secondary payload or lead the user to a fraudulent site. The ML classifier also strongly flagged this PDF as malicious.

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.club/wix?keyword=castle+crashers++pc+2018
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3179/6632/files/mukufipimer.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/nukatiwexoxikorukimuwetod.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6960/files/vajawege.pdf
    • https://static.usrfiles.com/ugd/b8c837_275931a6218d46978e50a8921bcc6fe1.pdf
    • https://static.usrfiles.com/ugd/d902bb_20b37595900b4017965283c1795ae08b.pdf
    • https://static.usrfiles.com/ugd/daca0d_91aee3fad1084fbda6a5deed5a79395c.pdf
    • https://static.usrfiles.com/ugd/3f4b99_54ac19b3f9e148589dd24548500018f9.pdf
    • https://static.usrfiles.com/ugd/c8df25_cf27d769179d4c4aa1d00416b4289782.pdf
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/wedding_invitation_templates_free_in_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0432/4098/0643/files/26560463214.pdf
    • https://static.usrfiles.com/ugd/930050_199c8df60eee4bfa9462937e8cc7ed14.pdf
    • https://static.usrfiles.com/ugd/7a359d_7eb5e664f2f64eefb461b809d328a153.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_off00004c31.bin
6d0528049453f34d23432973c5412adb0968e5c22beaf126de5b827a00e3458e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C31 5448 bytes
font_01_sfnt_off00005eaa.bin
765a94b047374664e1bcc118a6bcc061dd2deae42b117863ab598ef8f3e6ef4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAA 10284 bytes