Malicious PDF — malware analysis report

Static analysis result for SHA-256 590dd89ecf76146a…

MALICIOUS

PDF

43.1 KB Created: 2020-08-03 15:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d014b6ffbde50fad33425d37dd44bfc6 SHA-1: 68a77158261d53a63bf2979a890f32b329f8aa4c SHA-256: 590dd89ecf76146ad906a36088d543c328101a2cdf64b2aff31bc0e01000809b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URLs, including a redirector at 'ttraff.cc', strongly suggest an attempt to lure users to malicious sites. The ML classifier also provided a very high confidence score for maliciousness.

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.cc/pify?keyword=aida+model+pdf
    • http://files.bahamianmom.com/uploads/1/3/0/7/130739652/50cf1c451fa8a.pdf
    • http://files.leadpyramidpublishing.com/uploads/1/3/1/0/131070469/b18ede3.pdf
    • http://files.kennedyseminars.net/uploads/1/3/1/6/131606343/9901438.pdf
    • https://cdn.shopi
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/imperial_decree_rolls.pdf
    • https://cdn.shopify.com/s/files/1/0428/5651/3692/files/zesiladale.pdf
    • https://cdn.shopify.com/s/files/1/0431/5696/3479/files/buzajiriwuwojovilu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3178/7670/files/74480540184.pdf
    • https://cdn.shopify.com/s/files/1/0432/3154/3463/files/wuzekininafobikusurebat.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3964/files/sosigeled.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/12959971319.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0701/files/69237574495.pdf
    • https://cdn.shopify.com/s/files/1/0431/4172/6370/files/34396429247.pdf
    • https://cdn.shopify.com/s/files/1/0439/7708/0990/files/paruvuwogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4192/2977/files/tim_and_eric_space.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c85.bin
82f9e64fb840f467001afce9ef222b69546a9fcd5973e34c2a4ca69e0d43612c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C85 4904 bytes
font_01_sfnt_off00007d28.bin
eee8e6791ff40c80a2e03fcdd65d5614e03fbf24a720069653f5b10ca7300e5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D28 10244 bytes