Malicious PDF — malware analysis report

Static analysis result for SHA-256 84544d7d4a3e6f02…

MALICIOUS

PDF

75.9 KB Created: 2020-08-05 07:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01f7743456887e4ba4bdfb6fee6ff434 SHA-1: 330f9ae8a677f2fa7777b1c11210f9efb8fb03b4 SHA-256: 84544d7d4a3e6f027021e7784b124bf2c5bcf5eab367286a0570f8b0a5325f3e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm designed to mimic search results, directing users to a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=bridges+math+home+connections+grade+5+pdf. This technique aims to trick users into clicking malicious links by presenting them as legitimate educational resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=bridges+math+home+connections+grade+5+pdf
    • http://files.phyzarre.com/uploads/1/3/1/4/131407572/7349395.pdf
    • http://files.brigitteyearman.com/uploads/1/3/2/6/132681438/wexiw_memavilajij_gusadaxagoj_titejaduded.pdf
    • http://files.affinitybodyworks.com/uploads/1/3/1/6/131636814/d244cf369.pdf
    • http://files.chantitdownradio.com/uploads/1/3/1/8/131871518/02bd4f5e6b0d210.pdf
    • http://files.drawnbyspirit.com/uploads/1/3/1/4/131453918/giguko.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2005/files/37956345603.pdf
    • https://cdn.shopify.com/s/files/1/0437/9122/0887/files/begadilitilemozi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/30666219267.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0080/files/50958034832.pdf
    • https://cdn.shopify.com/s/files/1/0429/1811/7543/files/fetefurobebafolalulamoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/48505415446.pdf
    • https://cdn.shopify.com/s/files/1/0440/8305/2696/files/fijaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23651487672.pdf
    • https://cdn.shopify.com/s/files/1/0428/1552/0935/files/bebejawoxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/12142160738.pdf
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/museguxojabajem.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_off0000ed44.bin
4dffd3feaaa44fee3d0a4732a83186ad5060eda554ef90db949dccee677c0b5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED44 5708 bytes
font_01_sfnt_off0001008e.bin
37fbe201d5bac329ce721875647ccf76baa6f8e366d228bcb3ae90637fde7c11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1008E 9848 bytes

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