Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ca73ed26375335…

MALICIOUS

PDF

36.1 KB Created: 2020-08-24 17:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 996e0b91cd45654349668a6acb400bcc SHA-1: 93b570cd5ff7af3da214f8382ab4655d64d8daa7 SHA-256: 02ca73ed263753356549e1e43d003813a1c378a2cb6273ed1b90e4e3548f7a59
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=acknowledgement+slide+template', is flagged as a malicious redirector. The document body also contains this URL, suggesting an attempt to trick the user into clicking it. The presence of numerous other links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic. No scripts were extracted, but the primary malicious behavior observed is the redirection to a potentially harmful URL.

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=acknowledgement+slide+template
    • http://files.gojotekicon.com/uploads/1/3/0/7/130738666/6a38ff235d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/79329016873.pdf
    • https://cdn.shopify.com/s/files/1/0435/5339/0743/files/70620981222.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/96351513419.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/dorataligin.pdf
    • https://cdn.shopify.com/s/files/1/0433/8964/9054/files/samsung_chromebook_series_3_xe303c12_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/learn_portuguese_brazilian.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9287/files/89190568229.pdf
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/airtel_tv_apk_for_mi_tv.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_off00004eaa.bin
613a3fb951e26564af1fd4213a82493418f8d8361200d86076cc6869be70445f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EAA 5444 bytes
font_01_sfnt_off0000612d.bin
1ee0b442b8a31431c4693f1015a621a665a91bcee730771483b1ae516bde101b
pdf-font-stream PDF embedded font (sfnt) at offset 0x612D 10240 bytes