Malicious PDF — malware analysis report

Static analysis result for SHA-256 114c3245991e61e3…

MALICIOUS

PDF

43.6 KB Created: 2020-08-13 23:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30369a3f2e57ff046fe07c67b0ef976e SHA-1: 8fab3be667991031b993e4be2ca58fc5c4848eb6 SHA-256: 114c3245991e61e314997ab4de7057dba197afe6100693b0c0fd61c1e5a39d78
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 known to host malicious content. The document body, though heavily obfuscated, contains a URL that appears to be the primary redirection target. The presence of numerous links suggests an attempt to create a link farm for SEO manipulation or to obscure the malicious destination.

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.ru/pify?keyword=new+bongo+music+2018
    • http://files.creative-edge.services/uploads/1/3/0/8/130813829/ropapiwaxabukot-gununufip.pdf
    • http://files.muttairbrushandartsupply.com/uploads/1/3/1/4/131437508/vapub.pdf
    • http://files.dianawilliams-artist.com/uploads/1/3/1/4/131453021/120588.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/pifabobimesefivukorilen.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/chemistry_experiments_book.pdf
    • https://cdn.shopify.com/s/files/1/0443/9313/6294/files/a_grief_observed_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1030/1847/files/32051118435.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/kuwib.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0136/files/nucleo_caudado.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/55664241072.pdf
    • https://cdn.shopify.com/s/files/1/0432/4284/8418/files/5341191648.pdf
    • https://cdn.shopify.com/s/files/1/0431/9612/1252/files/aerospike_database_a_complete_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/6454/7741/files/what_is_discord.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/rumuzukidi.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_off00006294.bin
bc87bf4b572396cb2559300a5bec5cb8585c85060e0224c37316a595f1d53ab8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6294 5504 bytes
font_01_sfnt_off00007559.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7559 1800 bytes
font_02_sfnt_off00007de6.bin
6d9b95099b25ed4397c7a025d8606503d8f8c072de4d6166fcb6b0acbfec8030		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE6 10448 bytes

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