Malicious PDF — malware analysis report

Static analysis result for SHA-256 6730f080c6f75831…

MALICIOUS

PDF

48.2 KB Created: 2020-08-10 21:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e8a68fdd56475ae8d1f9f48bfa1aa13 SHA-1: 9448f6a2cb44cb097d9ab6016155d1677a80757b SHA-256: 6730f080c6f75831059b04de2f82182480e164964f23ae96780166e9700e4d9e
154 Risk Score

Malware Insights

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

This PDF document is designed to act as a lure, presenting a deceptive title ('Cphi exhibitor list pdf') to trick users into clicking on embedded links. The primary malicious link, https://ttraff.ru/pify?keyword=cphi+exhibitor+list+pdf, redirects to potentially harmful content. The document also functions as a link farm, containing numerous SEO-optimized PDF links, many of which point to benign Shopify domains but serve to inflate the document's apparent legitimacy and searchability. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=cphi+exhibitor+list+pdf
    • http://files.urbanbiologistbali.com/uploads/1/3/1/4/131437806/losob.pdf
    • http://files.lajalostudio.com/uploads/1/3/2/7/132740424/2497877.pdf
    • http://rapura.ellertonwesleyanchurch.com/uploads/1/3/1/0/131070374/eb9134.pdf
    • http://files.promegauk.com/uploads/1/3/1/4/131408899/mevurugigudotebive.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6224/8102/files/alternator_voltage_regulator.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2664/files/20483792017.pdf
    • https://cdn.shopify.com/s/files/1/0440/6244/1637/files/musodijetogogikubateb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10217245918.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/pdf_autobiography_of_benjamin_franklin.pdf
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/60166015311.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7271/files/67418243271.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/kanubasodato.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/bojof.pdf
    • https://cdn.shopify.com/s/files/1/0428/8951/1071/files/kolesonevaxulupatomoxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0132/3421/files/nuvufurutokaseruf.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/pivitikopuxabelunopar.pdf
    • https://cdn.shopify.com/s/files/1/0432/7289/6672/files/37080612141.pdf
    • https://cdn.shopify.com/s/files/1/0436/0385/3469/files/fexezovuwitisokolasaze.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_off000069ec.bin
3110a93377bbb2036ff058ec84adb36b59868fbb1dcc837ef3116ced4dcce756		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69EC 5032 bytes
font_01_sfnt_off00007afc.bin
4c0e7602d0bc0a5e51c658259eabba9483662c88af94617a1dff2046e8641b0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFC 10364 bytes
font_02_sfnt_off00009e82.bin
2a726e4d8e078a4a4a6a0bed67b139344cab8167eb027720faf42c08020076b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E82 16120 bytes

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