Malicious PDF — malware analysis report

Static analysis result for SHA-256 fffa611c0ac3e5c8…

MALICIOUS

PDF

40.9 KB Created: 2020-08-04 15:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5de5247419b90309bf583e85695ae8d SHA-1: 32465d8711717a74cfc812f03986b043b0f5844f SHA-256: fffa611c0ac3e5c8d14da8f47f93a0400627d83c2af4056e4415bed1288b9f5e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Immunization record ontario pdf' and a URL that matches the malicious redirector, suggesting a lure to trick users into clicking on malicious links. The presence of a link farm further supports the malicious intent.

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.com/pify?keyword=immunization+record+ontario+pdf
    • http://files.amaakarate.com/uploads/1/3/1/3/131384025/xokewapereza_velekoj_luretonuve.pdf
    • http://jepunosu.erinpatrickmiller.com/uploads/1/3/0/7/130776644/6817414.pdf
    • http://files.fortyukon.net/uploads/1/3/1/3/131379719/9029852.pdf
    • http://files.pthsenglishgarden.com/uploads/1/3/0/7/130776277/4b08dcaeed113b.pdf
    • http://files.brett-andreas-portfolio.com/uploads/1/3/0/8/130874599/db5235e17baf70.pdf
    • https://cdn.shopify.com/s/files/1/0436/0221/5069/files/94922811415.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/xirukiwid.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3318/files/text_recovery_converter.pdf
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/sugejumo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4266/8698/files/gepogejosadoguxeweluzuge.pdf
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/telonuvekilofa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2545/files/wazibenube.pdf
    • https://cdn.shopify.com/s/files/1/0435/3271/4139/files/jatevagileniwigexeke.pdf
    • https://cdn.shopify.com/s/files/1/0432/6634/3072/files/14419256731.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/3319126271.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/86712067335.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/99769876494.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_off00006275.bin
05338f88c8993b9117aeaa98331ecc6b698a8abbe2d947a4e5165a3a46c630f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6275 5080 bytes
font_01_sfnt_off000073af.bin
cf1f2f376d906d51497a69875bbc42212fddd032ea33480f1bae30be2ed74639
pdf-font-stream PDF embedded font (sfnt) at offset 0x73AF 10284 bytes