Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c82f98ca164d5e…

MALICIOUS

PDF

46.3 KB Created: 2020-08-19 08:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ffa1d0ea481825d741320a35d34abbc SHA-1: 2726798cfed7278a8c39593d11ad02247ba251e5 SHA-256: 77c82f98ca164d5e95bc3e6734f312b805eef8956a947399c257f59bc7ac2f23
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, disguised as a 'meeting agenda template'. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the heuristic firings indicate a phishing attempt designed to redirect users to potentially harmful content.

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.cc/pify?keyword=meeting+agenda+template+free
    • http://xovatinen.jessicaluni.com/uploads/1/3/1/4/131482952/linowufakuzijuxub.pdf
    • http://kuvafoga.siobhanmcgibbon.com/uploads/1/3/0/7/130775795/tufaguninilonepugin.pdf
    • http://files.punchlistms.com/uploads/1/3/0/7/130739664/5d899f75d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0166/6969/files/2018_honda_crv_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zututekafufefosapebuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1520/files/69101160699.pdf
    • https://cdn.shopify.com/s/files/1/0433/2699/6633/files/11384469039.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/commercial_pilot_oral_exam_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/wefaxiwedoraxoxima.pdf
    • https://cdn.shopify.com/s/files/1/0433/5609/4614/files/cellophane_sheets_near_me.pdf
    • https://cdn.shopify.com/s/files/1/0440/9825/7048/files/itc_hs_code_list_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c7e.bin
3cb836c4d72292ba590999a3e1af69615ad33cda991cc609501c29af97540b5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7E 4864 bytes
font_01_sfnt_off00007ced.bin
cb2b169d00a964536a463443c7555464a1505c94e630d0276f215bb7f5aaf586
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CED 9856 bytes
font_02_sfnt_off00009e8e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E8E 4324 bytes