Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e45e187c8f0f8f7…

MALICIOUS

PDF

62.9 KB Created: 2020-08-21 06:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bfe5b1960d26ce9d445d34a42b6e264 SHA-1: d0fd7c8f7d17c29c1aafe5ebfb8aef4389b7ed02 SHA-256: 0e45e187c8f0f8f7568147c218bac1613598bf1f4e87f3021fb496f8a945e942
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector URL (https://ttraff.ru/pify?keyword=ratio+analysis+internship+report+pdf). Another critical heuristic identified a PDF link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. While no scripts were directly extracted, the PDF structure and embedded links point towards 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=ratio+analysis+internship+report+pdf
    • http://kuzet.hwollintherapy.com/uploads/1/3/1/0/131070450/52c3ac8ce29a.pdf
    • http://files.aj-marketing.co.uk/uploads/1/3/1/8/131858916/mixiwovuk_zovopigane_zuxowe_vaxetitutawig.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5598/8387/files/lexetisive.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84407481133.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/19849015633.pdf
    • https://cdn.shopify.com/s/files/1/0434/2074/5893/files/wikulonuzosejupugerizosoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4204/6103/files/22075862103.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/57620859524.pdf
    • https://cdn.shopify.com/s/files/1/0432/9829/1870/files/6326097339.pdf
    • https://cdn.shopify.com/s/files/1/0429/3948/2278/files/52779336113.pdf
    • https://cdn.shopify.com/s/files/1/0438/8506/8456/files/convert_kindle_cloud_reader_book_to.pdf
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/zumakisizozamozonadoxosi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0586/2307/files/gadusokij.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7961/files/how_to_mute_discord_while_streaming.pdf
    • https://cdn.shopify.com/s/files/1/0440/9583/2216/files/basic_english_learning_book_download.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_off0000a6d4.bin
a63dc7203ceba2031beaf1d50b83973ffdd0483474384fa5780efc3deacec6ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D4 1696 bytes
font_01_sfnt_off0000aefe.bin
164d0e28b9e97c00126085cadb1035373bb889b8df953051715a6840d4ad81b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEFE 5236 bytes
font_02_sfnt_off0000c0d2.bin
1f6c70c737bf19bc88136de831d3613cb632fbdeae7b6560a54e2e9b94e3ce0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D2 14452 bytes

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