Malicious PDF — malware analysis report

Static analysis result for SHA-256 66c7b0a2cafc63a1…

MALICIOUS

PDF

44.6 KB Created: 2020-08-07 14:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e95bf98a90afcbb005759efbd8cbfeb SHA-1: bb81dbb5fe1884e02ab423e726fd95eff3d25bb9 SHA-256: 66c7b0a2cafc63a13bf03c687fffbc00ad94ee852cee57c84ee60b9e2fb3edbb
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains text referencing 'Nhai quality assurance manual 2020 pdf' and the malicious URL, suggesting a lure. The presence of numerous other links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

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=nhai+quality+assurance+manual+2020+pdf
    • http://files.shop.bushnvinefarm.com/uploads/1/3/1/0/131069812/9458d295b.pdf
    • http://files.dancingvulturedesigns.com/uploads/1/3/1/4/131453124/zerusonopufexu.pdf
    • http://files.whosyoko.com/uploads/1/3/2/6/132682934/4135261.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/brgeramt_berlin_anmeldung.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/72964142455.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/erupo_acneiforme_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/zonisukufatuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/zomimomesekilireto.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/gajujubazewidina.pdf
    • https://cdn.shopify.com/s/files/1/0433/1313/5774/files/lifimefaxaweliravozus.pdf
    • https://cdn.shopify.com/s/files/1/0435/7698/3713/files/34187383531.pdf
    • https://cdn.shopify.com/s/files/1/0434/7559/9524/files/43204029982.pdf
    • https://cdn.shopify.com/s/files/1/0434/9011/5748/files/halfhitch_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9585/files/52905064758.pdf
    • https://cdn.shopify.com/s/files/1/0431/9713/7056/files/33846622831.pdf
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/55934028880.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_off00006136.bin
037348d00de86d60561dca873b97a489317e58838b07e5ad11b78ef065147ce6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6136 5640 bytes
font_01_sfnt_off00007436.bin
71143ccb07de718e8bdf13240cc8fd8703b45321bb148947c53dfef2f3107e5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7436 10244 bytes
font_02_sfnt_off00009708.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9708 4324 bytes

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