Malicious PDF — malware analysis report

Static analysis result for SHA-256 652bbfbde7e227c8…

MALICIOUS

PDF

44.2 KB Created: 2020-08-04 09:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8678be7e276b0d2f1a2a1e47e4dbc0ba SHA-1: e521a8b6722ba2a079edc80832c5eb93db94aac7 SHA-256: 652bbfbde7e227c8b8f47a83ded260d468a0ec059d73634b0084390799bc4808
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to what appears to be a link farm designed to mimic search engine results. One prominent link, 'https://ttraff.com/pify?keyword=steps+in+personal+selling+process+pdf', is flagged as a malicious redirector. This suggests the document's primary purpose is to trick users into clicking malicious links, likely leading to further compromise or phishing attempts.

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=steps+in+personal+selling+process+pdf
    • http://files.taxcorestaurantpv.com/uploads/1/3/1/4/131438308/5147613.pdf
    • http://files.safaglass.net/uploads/1/3/2/6/132696598/c4f4707c0c.pdf
    • http://ridumab.catherineofsienaparish.org/uploads/1/3/0/7/130776449/15d7c4c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/wifislax_tutorial_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/7314/2933/files/2008_vw_eos_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8164/files/86583712700.pdf
    • https://cdn.shopify.com/s/files/1/0431/8612/7009/files/5109884841.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/90448404911.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7647/files/godoravezig.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/yamaha_maxim_750.pdf
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/comodo_intermediate_cert.pdf
    • https://cdn.shopify.com/s/files/1/0432/1771/5361/files/muwilibajogivofakulojov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovovowegafakaroseras.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/logic_gates_and_boolean_algebra_simplification.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_off00006eb4.bin
d698af773e14abbc8fecb069a6b8049bd9ca1603372bd940523ad7da655ab84b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB4 5424 bytes
font_01_sfnt_off00008131.bin
16c5198aa7198a7930a1eab7237f5f4acdf5530379db290e8cdc3e024dc7b978
pdf-font-stream PDF embedded font (sfnt) at offset 0x8131 10148 bytes