Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a8a3ec6f888a44…

MALICIOUS

PDF

33.9 KB Created: 2020-08-19 11:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a2a997ec26ae0a27ba9ac7d08e6ce2f SHA-1: bee6cc03628a2e9aa7dc4bbac0d1913d2208486c SHA-256: 70a8a3ec6f888a446c4d459e35d7961ecbf81a7d33e31f8b5414dfbfd5d62d3b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL, https://ttraff.ru/pify?keyword=amman+songs++wapwon, is likely used to redirect users to further malicious content. The document body contains garbled text and embedded URLs, reinforcing the link farm and redirector findings.

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=amman+songs++wapwon
    • http://files.topshedutah.com/uploads/1/3/0/9/130968935/fc06265fae2993e.pdf
    • http://files.thebirthyurt.com/uploads/1/3/1/3/131380308/talujikuj_pamanojek_wovefitiferufem_bokowizodapeto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0395/9720/files/algebra_1_domain_and_range_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0243/files/89730920993.pdf
    • https://cdn.shopify.com/s/files/1/0428/6359/1590/files/du_battery_saver_pro_app_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4913/9880/files/68697547178.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/wakitikasevonotubile.pdf
    • https://cdn.shopify.com/s/files/1/0431/5778/2690/files/nipopusurabasilogesi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8361/9738/files/asbestos_roofing_sheet_disposal.pdf
    • https://cdn.shopify.com/s/files/1/0432/2885/6477/files/vajurifanivozuwupenovafen.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7333/files/67554737826.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2246/files/causes_and_consequences_of_flood.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5995/files/51921569633.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_off00004900.bin
2745bf7dd9bf83e072487d0710077c0e17da16ada49304df6e2b6f7cce52abb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x4900 5092 bytes
font_01_sfnt_off00005a52.bin
3e55822a5f60484ec15d75beee733c1e03869ee0439b570b7033645836605bae
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A52 9624 bytes