Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f578a50e961307…

MALICIOUS

PDF

71.8 KB Created: 2020-08-08 21:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2344fee74bb05dd98707971650666a77 SHA-1: e4da75071105989d58f99178026e182d72273e26 SHA-256: 12f578a50e961307de2ac4046640f3541ca42374bd683b4294c6bac4b062e2e8
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The embedded URL `https://ttraff.ru/pify?keyword=conducting+choral+music+pdf` is flagged as malicious, suggesting it leads to harmful content. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF links, likely to disguise the malicious intent.

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=conducting+choral+music+pdf
    • http://files.gzpianoduo.com/uploads/1/3/1/4/131454523/lososomokoworemobana.pdf
    • http://jadom.mitchellgroupinc.com/uploads/1/3/1/1/131164250/dc18068.pdf
    • http://gapavujot.grpwoodworks.com/uploads/1/3/0/8/130874359/pegexudij_vokewigifaba_bezagojilon_jokufede.pdf
    • http://files.lorimerconsulting.co.uk/uploads/1/3/1/4/131453543/kuwesafixitas.pdf
    • http://files.makergirlz.org/uploads/1/3/0/8/130813841/2527826.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/41869298214.pdf
    • https://cdn.shopify.com/s/files/1/0430/4620/7650/files/96864690383.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/zipuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/8151/3625/files/84892386224.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/16610358367.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8246/files/97291966754.pdf
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/95403426621.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/21729930874.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/vofojetizoxudarawodoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54903558396.pdf
    • https://cdn.shopify.com/s/files/1/0438/6829/1232/files/28748121700.pdf
    • https://cdn.shopify.com/s/files/1/0431/3556/5978/files/arap_bahar_sonras_trkiye_suriye_ilikileri.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/tofame.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/gegobal.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c670.bin
16fbe7ae9f4ec6c2d545811a6fd3e8d3c673f07882ed8058668a84558a4d8152		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC670 5476 bytes
font_01_sfnt_off0000d8db.bin
b0ee152db52d70e451aa63b0a9773f5b37bb2eefdb5e065e939a1ba22734a48d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DB 10444 bytes
font_02_sfnt_off0000fccc.bin
2cfc97915d250804213c9b0e6ad261e0979cd38371fb36ec9174dea58a153a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCC 16120 bytes

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