Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c0fbfc111c7408…

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 06:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61f92048a626ca89e9a6bb91a45b73e5 SHA-1: aa06005bdbb4a0b1941f1f46131cf0e1bae8c4d9 SHA-256: 07c0fbfc111c7408b6941b015686cd2bc43f097f158088e5c358f422e68420b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link farm designed to redirect users to malicious infrastructure, specifically identified as 'ttraff.ru'. The document's content, though obfuscated, includes the target URL, suggesting an attempt to trick users into visiting potentially harmful sites. The ML classifier strongly indicated maliciousness, and the presence of numerous external links supports the classification as a redirector.

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=the+saga+of+the+volsungs+jackson+crawford+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e745be_7ed4f22435ea48efb7f97acd2354b1d3.pdf
    • https://static.usrfiles.com/ugd/9904c2_a01099fc7a704d918afc8d2cc794302a.pdf
    • https://static.usrfiles.com/ugd/3b47cb_36eee5864bc140009f764aa75f9b11f5.pdf
    • https://cdn.shopify.com/s/files/1/0438/6340/8795/files/15867728437.pdf
    • https://cdn.shopify.com/s/files/1/0432/7450/2312/files/80775681576.pdf
    • https://cdn.shopify.com/s/files/1/0432/0398/5570/files/app_store_apk_latest.pdf
    • https://cdn.shopify.com/s/files/1/0437/2204/7637/files/british_council_english_speaking_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/autodesk_trueview_convert_dwg_to.pdf
    • https://cdn.shopify.com/s/files/1/0437/1293/8152/files/libro_de_geografia_de_4_grado_sep.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/tuponexisijigomimugu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1320/files/46479506464.pdf
    • https://cdn.shopify.com/s/files/1/0435/0243/6512/files/zasetunisaxikozisewaz.pdf
    • https://static.usrfiles.com/ugd/b8c837_98fd96e897cd4cdc8a5b05b1f5ad7974.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e04610e10ff46a4b195ffd7d0581162.pdf
    • https://static.usrfiles.com/ugd/b8c837_d786d22958c44340b8f8c1fee947473f.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_off00005cf6.bin
bdd99be52e21602daec7ce54a34bf8246e8b3d71065b280b3b61bf4f34255d50
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF6 5660 bytes
font_01_sfnt_off0000704a.bin
3e3daeea2e62a46134451163212fdb5eb4d9d3791597828cb3c5557f5c862a0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x704A 10144 bytes