Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc1edc72c3ec800…

MALICIOUS

PDF

44.6 KB Created: 2020-08-19 06:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d10b134a9dfaebea66e3a88f77e49eb6 SHA-1: 12e5e5311efd28ada91b298ae8989efd648a3c7d SHA-256: 5dc1edc72c3ec800f05449441b6006bb987b5c7a341a507dc35dd6cda09d1d0c
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.com, which is likely used to funnel victims to further malicious content. The document body and embedded links suggest a lure related to Chromecast VPN workarounds, aiming to trick users into clicking the malicious link. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking for 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.com/pify?keyword=chromecast+vpn+workaround+android
    • http://xegupid.sallieharrisondar.org/uploads/1/3/0/7/130775451/lusunuwo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7316/6757/files/83480725468.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8383/files/juvofus.pdf
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/60502930165.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/49295448698.pdf
    • https://cdn.shopify.com/s/files/1/0434/7101/2006/files/lawuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/simplifying_algebraic_expressions_test.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/28386993763.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62042090741.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/91219103237.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/sawenowovotevegemodokeru.pdf
    • https://cdn.shopify.com/s/files/1/0437/0504/1051/files/alif_full_novel_free_download.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_off00006e74.bin
f4718a8e185937579840b4510a8b4589109b07078a937347d6cf3027ee775a0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E74 5404 bytes
font_01_sfnt_off000080ba.bin
fee2f339b77bf815b4c654a21153b45c7f987356222497765dc0cc95c3b13112
pdf-font-stream PDF embedded font (sfnt) at offset 0x80BA 11300 bytes