Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d21a2f9e00e3ac9…

MALICIOUS

PDF

56.9 KB Created: 2020-08-29 16:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89c199e1d3b2ad6a5963ffa6c4e2c0d8 SHA-1: 6bbf87c0574e47caf4ea7e4b5233555d288b52e1 SHA-256: 6d21a2f9e00e3ac980ba4575ffa1ee4257f6ef9d578e2206111fd3d18f80ab9a
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract search engine traffic. The ML classifier also 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.cc/wix?keyword=automatic+irrigation+system+using+microcontroller+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_f5f882c6613d40fea5d074ba869034d0.pdf
    • https://static.usrfiles.com/ugd/067ecb_2a3310bead7f4775add3c9d4b2a094e7.pdf
    • https://static.usrfiles.com/ugd/6da380_84a0b026261a4087a07b9c0b05e8d80e.pdf
    • https://static.usrfiles.com/ugd/b8c837_51d76e8191ad4e54acb8116c35b0e87a.pdf
    • https://static.usrfiles.com/ugd/b8c837_67761bb8f012408c89f3071306faa2bc.pdf
    • https://static.usrfiles.com/ugd/9219f8_e94796f19536429d80266392257f7394.pdf
    • https://static.usrfiles.com/ugd/fd3290_45e7baa5139d42fab84b9bef8b608ab6.pdf
    • https://static.usrfiles.com/ugd/b8c837_1902b7e3d2804492a3faf56f5da7441f.pdf
    • https://static.usrfiles.com/ugd/b4a829_07669fb650734411b7a7082ece723c31.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1688ae0d4854c749b564f0fb6d15fe0.pdf
    • https://static.usrfiles.com/ugd/b8c837_85c083b6b0854b4e8345a9ec73436407.pdf
    • https://cdn.shopify.com/s/files/1/0431/2354/0124/files/tezivekilopixeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/1895/1576/files/science_reporter_magazine_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0809/7436/files/wexubefixizav.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/levodetolaledoxiliwofewuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1687/9271/files/tagawakin.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_off000092a3.bin
869658c1dd0583f1a15d35b34312dcd61d475bc400dfd4ed10a542589431e6cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92A3 5448 bytes
font_01_sfnt_off0000a516.bin
f1964a3d3f1b26d8dc1ef611ef1584a3d06dad04a53cf3075ed0c20e4d660641		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA516 10136 bytes
font_02_sfnt_off0000c7bc.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BC 4324 bytes

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