Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c9baab895a3b39…

MALICIOUS

PDF

40.8 KB Created: 2020-09-07 23:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33160bb3c156488018d0655351994cd1 SHA-1: 4a6c555830a907f304b805ad9b0902ff393f136e SHA-256: c6c9baab895a3b396185dd24f179f02f106dc7b2a246c3e02fc0cc6e7e631625
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to 'https://ttraff.me/wix?keyword=wizard+of+legend+boss+guide'. This technique is often used to distribute malware or phish for credentials. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded URLs supports the attack pattern.

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=wizard+of+legend+boss+guide
    • https://static.usrfiles.com/ugd/66c878_8f810cf7eb45435c8ae8f40255acaf06.pdf
    • https://static.usrfiles.com/ugd/b8c837_827273defede44d1b6180b8bfe373ef4.pdf
    • https://static.usrfiles.com/ugd/6a4619_7ede8199059c4c5ab4cfe81aab3deac9.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/23632785003.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6294/files/56697952747.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9137/files/intermolecular_forces_worksheet_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/sujisamulife.pdf
    • https://static.usrfiles.com/ugd/538d67_cbbad724781b403d9237f140e991bf30.pdf
    • https://static.usrfiles.com/ugd/851c7c_54c0def027fd40d992e3166dcc9b20d8.pdf
    • https://static.usrfiles.com/ugd/8b2c09_1f323e7a069642f1adfc433aa4648a8e.pdf
    • https://static.usrfiles.com/ugd/01e791_eed65aa4863d42da91ff4b3da0a70c40.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/visodi.pdf
    • https://cdn.shopify.com/s/files/1/0447/9008/7829/files/bull_shoals_arkansas_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0440/7322/2294/files/investigation_findings_report_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/0709/8529/files/android_bitmap_set_scale.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_off0000614e.bin
5db5be92fd2f68fcac1d688eee5c2f2b98fd894b59c0a39b995bf7aa6de00687
pdf-font-stream PDF embedded font (sfnt) at offset 0x614E 5276 bytes
font_01_sfnt_off00007366.bin
5fab1c2ff5f137ed5876c8a9a0fc7b8da67cf1cd2ae4d16bf6a2fd7915b20b74
pdf-font-stream PDF embedded font (sfnt) at offset 0x7366 10456 bytes