Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a8aedc810a5311…

MALICIOUS

PDF

49.4 KB Created: 2020-08-06 17:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ddbe2fcda64a2796e743c155bfb7443 SHA-1: 77eadf83b4a3f73eccc468135402b0f4cd5a10ec SHA-256: 62a8aedc810a5311ca35b91e78f6101d5360e376e976bdca2409631dd477b38f
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=cours+sur+l+%25C3%25A9tat+de+rapprochement+bancaire+pdf'. The document body, though partially obfuscated, suggests a financial topic ('rapprochement bancaire') intended to deceive the user. The presence of many external links, some benign and some malicious, indicates a link farm or phishing 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.cc/pify?keyword=cours+sur+l+%25C3%25A9tat+de+rapprochement+bancaire+pdf
    • http://files.missinternationalaustralia.com.au/uploads/1/3/0/7/130740338/pidopoje-lijotebo.pdf
    • http://files.brucehammock.net/uploads/1/3/0/7/130775509/solafelugubat-nalumes-tuwimabiji.pdf
    • http://gurudot.emilyreynoldsart.com/uploads/1/3/1/6/131636612/neguvazuwur.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0203/5354/files/wabuvuxopanasixurutaboru.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/pokegasudumozererapa.pdf
    • https://cdn.shopify.com/s/files/1/0439/6656/2462/files/55974579738.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0605/files/57700046399.pdf
    • https://cdn.shopify.com/s/files/1/0430/7143/9001/files/59837933289.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/44429965762.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wesani.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/xigovepubuxaletemesojexok.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/25054041036.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/javideketa.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8919/files/kejijelefizuzuki.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/80249401855.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_off00006e0f.bin
c4d1a53d937dc80cc27e4df479f32ca6cbda414fa749da358494056b5d309486		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0F 1644 bytes
font_01_sfnt_off0000763e.bin
62253996835a41e6b55787488867f39f66d3f4c66c778bf46d4c2fd70d9bfbd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x763E 5580 bytes
font_02_sfnt_off000088bc.bin
67b1c5d2c283f4060e1edc0e61007f4605a4e425e2197354e0ca48ede59c2fcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88BC 15104 bytes

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