Malicious PDF — malware analysis report

Static analysis result for SHA-256 6268dda5cda5b8b3…

MALICIOUS

PDF

40.4 KB Created: 2020-08-24 09:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 422d1430911222389508b9823d888311 SHA-1: 9ded7243de0d64047162ae093cc6787fae4c3112 SHA-256: 6268dda5cda5b8b3f9be2ee970094d248008c2f5e86c8b9456db1da06b6a87d1
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 used to obscure the final destination of the malicious payload. The document also hosts a large number of other PDF files, suggesting a link farm or SEO poisoning attempt to attract victims. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

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=couch+potato+tv+show
    • http://files.ascotdance.co.uk/uploads/1/3/1/8/131871864/ravojomewiwojun.pdf
    • http://files.capetowndaytours.net/uploads/1/3/0/8/130874629/bugob-bowon-jozopo-vudux.pdf
    • http://files.gulfbreezerotary.com/uploads/1/3/0/8/130813730/7614832.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/vuraro.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/tipevevorutozalajulose.pdf
    • https://cdn.shopify.com/s/files/1/0437/6097/6021/files/sirigozobexirirarobiritus.pdf
    • https://cdn.shopify.com/s/files/1/0431/2835/7030/files/97458282030.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/vubusaxaweletune.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/artemis_fowl_graphic_novels.pdf
    • https://cdn.shopify.com/s/files/1/0435/6007/5427/files/nomejikaxovumepofedidaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/candle_making_machine_price_in_ethiopia.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/77527649945.pdf
    • https://cdn.shopify.com/s/files/1/0462/4374/1845/files/57232087960.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/basal_metabolic_rate_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0434/8067/8564/files/tamil_ultra_hd_movies_2019.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_off00006155.bin
812b8185c2a878c0400e3181fd80a94cff4527665e69bab9e12f4afac4093079
pdf-font-stream PDF embedded font (sfnt) at offset 0x6155 4952 bytes
font_01_sfnt_off00007240.bin
9b7a7c6ad30b526413ba316bc2374bba0c09a3cae0e608a70e815c07c18eccd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7240 10060 bytes