Malicious PDF — malware analysis report

Static analysis result for SHA-256 159e983bb0b795ea…

MALICIOUS

PDF

48.9 KB Created: 2020-08-23 13:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74b667c09f72cca9d56693b99df757d7 SHA-1: 0f16fbcfdee629019b2c7731cc24e85ea9309b32 SHA-256: 159e983bb0b795ea121fcb5d90a11f0e6e1cd35003352a0b4e33e826eff2b912
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate documents hosted on Shopify. However, one of the primary links redirects to a known malicious domain (ttraff.ru), indicating a phishing or redirection attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a link farm or redirection scheme to distribute malware or lead users to malicious content.

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=waste+material+use+video
    • http://files.davezoby.com/uploads/1/3/1/0/131071243/818610.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/2806/0059/files/graco_4ever_all_in_one_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/26685716583.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/fulokoza.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/wagasiga.pdf
    • https://cdn.shopify.com/s/files/1/0434/7048/7712/files/luvoniriwabox.pdf
    • https://cdn.shopify.com/s/files/1/0429/6163/3439/files/gegik.pdf
    • https://cdn.shopify.com/s/files/1/0435/7691/8175/files/59757785154.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/gambar_sistem_pencernaan_manusia.pdf
    • https://cdn.shopify.com/s/files/1/0437/2529/1674/files/13077663636.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2555/files/bevobinidajubawezo.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_off000080bd.bin
765d2f20b48b765d2a2dba756f8147e25d419d23d19548360451ac85050cfa6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x80BD 5044 bytes
font_01_sfnt_off000091d1.bin
6237f3214c6ee6a131529810966f0712fe4909d73ee2a57aaa8e81fbddfce874
pdf-font-stream PDF embedded font (sfnt) at offset 0x91D1 11216 bytes