Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c6f74f5c963332…

MALICIOUS

PDF

49.8 KB Created: 2020-08-10 14:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15ad1c657506df0495c00ef69d7e290d SHA-1: d6e0c38e74827148711bd93b2434e279e1968c9e SHA-256: 64c6f74f5c9633320a466d70619546c30fe25d04815d720cabc9c5111d62102f
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector service designed to obscure the final malicious destination. The primary malicious URL identified is https://ttraff.com/pify?keyword=anand+kumar+theorem+pdf, which is part of a link farm strategy. The ML classifier strongly indicated maliciousness, and the PDF structure suggests an attempt to lure users to external, potentially harmful, content.

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=anand+kumar+theorem+pdf
    • http://files.miltonmurray.org/uploads/1/3/1/6/131606644/nelemilor.pdf
    • http://files.fanuna.com/uploads/1/3/0/8/130874647/lukanawujawim.pdf
    • http://files.memoriestomasterpiece.com/uploads/1/3/1/3/131382032/2928302.pdf
    • http://files.flemmingbusinessservices.com/uploads/1/3/0/7/130775245/nopaxovumu.pdf
    • http://sobigan.thevealsonwheels.com/uploads/1/3/0/7/130738970/poxufu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/7253/4166/files/zajubaxebifaser.pdf
    • https://cdn.shopify.com/s/files/1/0434/6334/4280/files/87855925062.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/sensory_evaluation_of_food_statistical_methods_and_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1074/files/diagnostic_microbiology_mahon_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/9018/1286/files/96414557683.pdf
    • https://cdn.shopify.com/s/files/1/0428/2069/8268/files/fizonexomen.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/42723634905.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/vadegukenolilinonax.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/64556160986.pdf
    • https://cdn.shopify.com/s/files/1/0431/6751/4788/files/diduduzajedon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078a0.bin
b3111d86d299aa345dbe0a3c0ebc11c89fcc9bbd4710731df28cdb6890c4dd51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A0 4960 bytes
font_01_sfnt_off00008942.bin
bb2987d725cf53ddb7ff0b73b60849891e33d6bfb67b23c671390bc4acabaa8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8942 10120 bytes
font_02_sfnt_off0000abed.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABED 4324 bytes

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