Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb7dd5ccc325030…

MALICIOUS

PDF

39.4 KB Created: 2020-08-04 11:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ea84e8957cd04877f1d4cc9a0189e8d SHA-1: ca492d49d9364e071d27dce1f1221adce7b4f1e3 SHA-256: 7eb7dd5ccc325030363613a5b8fb3799713686b87f2721a70ced4363a102b99a
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure and a large number of external PDF links, suggesting a link farm. The document body text, though heavily obfuscated, contains URLs that are part of this link farm. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document attempts to trick the user into installing something, likely to facilitate further malicious activity.

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.cc/pify?keyword=ontario+map+pdf
    • http://files.prettyandpinned.com/uploads/1/3/0/7/130739452/pazunokikoxituv-gomisav-velafozok.pdf
    • http://files.americasbestchildcare.com/uploads/1/3/0/7/130738881/pizama_maloxikerutejeg.pdf
    • http://files.crossfitrochester.com/uploads/1/3/0/8/130814611/ccad86.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/vididimikozabis.pdf
    • https://cdn.shopify.com/s/files/1/0430/8752/8103/files/sawokusadavomuni.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/situravotebevafaba.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/28607295569.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xaxigeruver.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/rerorizanewivedenisa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/kaxuriziputew.pdf
    • https://cdn.shopify.com/s/files/1/0437/2401/3722/files/honda_harmony_1011_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9537/4489/files/scope_statement_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59526866216.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0451/1324/5848/files/javascript_simulate_click.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_off00005d38.bin
1251cde02560f6e29c08dfc0a7c9e4fc5417c5dbdcadcd5c532a318c42bae055		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D38 5004 bytes
font_01_sfnt_off00006e25.bin
7711d7292d2f6739690e570b611dc38e1c47c8fc6ead87d528a0744a5321f5ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E25 10228 bytes

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