Malicious PDF — malware analysis report

Static analysis result for SHA-256 724dfe60dbc9f4c5…

MALICIOUS

PDF

35.6 KB Created: 2020-08-04 22:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b8da911d056d0d58e88d6ec74a35546 SHA-1: cb05864bfc90c9b65e6ac035e951f6f0df93ef83 SHA-256: 724dfe60dbc9f4c5a35ff981e98c4da2dd5c3748ab7362eda8e66a387a46a3ff
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically directing users to 'https://ttraff.com/pify?keyword=public+administration+journal+articles+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many of which point to Shopify domains. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a lure for academic or administrative content. The ML classifier strongly flagged this PDF as malicious.

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=public+administration+journal+articles+pdf
    • http://fuguwop.highspringsmuseum.org/uploads/1/3/1/0/131071243/4320999.pdf
    • http://files.merrittathletics.com/uploads/1/3/1/1/131164440/7795015.pdf
    • http://files.lynbrookmun.org/uploads/1/3/2/6/132695851/kobibopekanesanive.pdf
    • http://files.dairyfreedramaqueen.com/uploads/1/3/1/6/131606173/siberotixadosukuba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/62621044621.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65529241957.pdf
    • https://cdn.shopify.com/s/files/1/0437/8184/9245/files/63069643226.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5279/files/windows_game_bar_not_opening.pdf
    • https://cdn.shopify.com/s/files/1/0430/5892/1621/files/8927866229.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5567/files/95761131567.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2654/files/24911613293.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1412/files/durisekonapewofax.pdf
    • https://cdn.shopify.com/s/files/1/0431/4192/2982/files/dewixizetujob.pdf
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/65880231542.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9499/files/27454226706.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_off00004db6.bin
6dadcb120ae74447c2e17e6f3301791755ff5e3fcd3778c351f5d7408a41c8d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB6 5516 bytes
font_01_sfnt_off0000605f.bin
74bbb8f745373af3c3059265bf070a0fdb1985c45d0af8ae56d8ea08ed525aa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605F 9668 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.