Malicious PDF — malware analysis report

Static analysis result for SHA-256 63040204c0d7b2ae…

MALICIOUS

PDF

44.6 KB Created: 2020-09-17 23:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89cb5c6f4484c57f736795dd914bdd85 SHA-1: 2dc0ad8ccb6ae61096c47eeefa641fed31d4de20 SHA-256: 63040204c0d7b2aec3f54b507194b0bf979b33eff840536eec289f7dfe4f700a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that are part of a link farm, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for a 'Lenovo iomega ix4-300d setup', which is a common social engineering tactic to trick users into clicking malicious links. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.link/wix?keyword=lenovo+iomega+ix4-300d+setup
    • http://wivuj.mammas-amorepasta.com/uploads/1/3/0/7/130776445/089267d16db.pdf
    • http://files.brunolovric.com/uploads/1/3/1/8/131872087/nifuvitisew-dibekiwesi.pdf
    • http://files.tomsimonsonphotography.com/uploads/1/3/1/4/131437623/6534437.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5f04b4d2-85fe-4648-b04a-bb1b63d26deb.filesusr.com/ugd/4826f5_37e66e3819604251ae2bf881d488d316.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0462/5504/6807/files/cambridge_damtp_example_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/93717037256.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/visual_boy_advance_games.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4743/files/dungeon_seeker_novel_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4151/3894/files/43421727586.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2791/files/5162737746.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_off000066f9.bin
2f1d2ef400b30d7daf2175fb742115f43259cfe5cff5ac84e3f4772e6f42adcb
pdf-font-stream PDF embedded font (sfnt) at offset 0x66F9 5648 bytes
font_01_sfnt_off00007a3f.bin
77afe905a593d9a9176d807b035043d1086499ef431bc60f5e576824122ef126
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3F 13880 bytes