Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c7737c078a9d97…

MALICIOUS

PDF

42.5 KB Created: 2020-08-16 14:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc3137a7d0ffffbddc3c1820a472870a SHA-1: 24ee8e1f48c0c74670bf44f074f704c2117228e6 SHA-256: 10c7737c078a9d97413243068ff2d55381c2ca703affc3d81b35cf472feff49a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, also contains the URL 'https://ttraff.ru/pify?keyword=banarasiya+hd+video+song', suggesting a lure for SEO spam or phishing. The presence of numerous Shopify links, while many are marked benign, indicates a pattern of link farming. The ML classifier strongly flagged this PDF as malicious.

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=banarasiya+hd+video+song
    • http://lisagiba.newlife.ca/uploads/1/3/1/8/131856772/a629a27c249.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0432/0277/3156/files/52822885144.pdf
    • https://cdn.shopify.com/s/files/1/0437/5884/6110/files/sekaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/7333/8533/files/aditya_hrudayam_lyrics_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35535883354.pdf
    • https://cdn.shopify.com/s/files/1/0430/6219/8425/files/34554425372.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/benodul.pdf
    • https://cdn.shopify.com/s/files/1/0437/6192/6293/files/mokipuvikixilefete.pdf
    • https://cdn.shopify.com/s/files/1/0435/2288/3735/files/zavugekewasewevuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/dogureviju.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/89330620463.pdf
    • https://cdn.shopify.com/s/files/1/0434/0678/6725/files/formal_letter_example_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/amelie_poulain_piano.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_off000050d1.bin
ba0b2f8d4ee4ae6078c547ae754062def85b00f5bee25abc4a538cfb8e3de953
pdf-font-stream PDF embedded font (sfnt) at offset 0x50D1 5268 bytes
font_01_sfnt_off000062ba.bin
341b414754ddb14f952eaf02e80d289484d0efa3eddce680ea1c9028bcbccc8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x62BA 14300 bytes
font_02_sfnt_off00008fc8.bin
7d7db8f5655125293b4f9476062a320c8ef3c0bedafbca26cb660c0fe545cb6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC8 3000 bytes