Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b57ad665059d0b…

MALICIOUS

PDF

40.4 KB Created: 2020-08-16 14:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf79b22912ad9960c3122d7cd9f24bfe SHA-1: 7db4c667f86ca3d94a687516566501aae7ee7610 SHA-256: 07b57ad665059d0bdba4add42dab959d8f8452bb0675a220ce758b8e2ffefebd
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to download a malicious application or further compromise. The document body, though heavily obfuscated, contains the same URL and mentions 'Appvalley 2.0 apk', suggesting a social engineering lure. The presence of numerous Shopify links, while marked as benign, is characteristic of SEO link farm techniques used to obscure malicious destinations.

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=appvalley+2.+0+apk
    • http://xuzikepa.camdencathedral.com/uploads/1/3/1/3/131379225/xibolesakino.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/newabuja.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/35481506884.pdf
    • https://cdn.shopify.com/s/files/1/0428/6437/8022/files/ksb_pump_technical_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/jasininajedupugiper.pdf
    • https://cdn.shopify.com/s/files/1/0437/1388/8405/files/89954987123.pdf
    • https://cdn.shopify.com/s/files/1/0438/0108/4064/files/abortion_journal_articles.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7063/files/dedunodogaki.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/aldehydes_ketones_and_carboxylic_acids_ncert_solutions_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6482/6783/files/luradilexibazulenemebim.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/7285639734.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/71704626105.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/80285340507.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/ics_file_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/5452/1758/files/online_payment_form_template_html_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8795/files/86645859131.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eec.bin
da3de32df6eb6ce942e90de7fb44ad748fb290ed6030d4cdbba81fd220a3f38f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEC 5060 bytes
font_01_sfnt_off0000704d.bin
667e6d955ef6709cf2182d77f048e1cb573685f03c43a48194d45eb72281ceb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704D 10664 bytes

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