Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9aaa94e3f06cfd…

MALICIOUS

PDF

52.3 KB Created: 2020-07-31 22:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d32f76c905ce10010e1360054b8c4ea0 SHA-1: f5c920da873c524171e9bdb73b8f1cd5452c56b8 SHA-256: 9f9aaa94e3f06cfde83c730e072b96c19115534150576229be9c27fca40ec6f2
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with many pointing to a link farm hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=lego+batman+movie+yify, is identified as a malicious redirector. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious content, likely for phishing or malware distribution.

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=lego+batman+movie+yify
    • http://files.mammothapogee.com/uploads/1/3/0/8/130873846/2e95b4d700.pdf
    • http://files.fullertonspeech.com/uploads/1/3/0/7/130775868/mategurifuz_vukiru_roluk.pdf
    • http://files.achinabuffet.com/uploads/1/3/1/4/131453247/2281143.pdf
    • http://files.advancedmaterialsservices.com/uploads/1/3/2/6/132681150/7002507.pdf
    • https://cdn.shopify.com/s/files/1/0433/2886/4409/files/30682805051.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71135401618.pdf
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/51156932819.pdf
    • https://cdn.shopify.com/s/files/1/0439/9906/8310/files/34359408799.pdf
    • https://cdn.shopify.com/s/files/1/0439/6518/6206/files/mofemegiwevukifukubaguta.pdf
    • https://cdn.shopify.com/s/files/1/0440/5598/6326/files/kokabewefipo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5407/1957/files/ninudedekupulunopaseraxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0101/files/kejifoxopelokegajibuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/74379779174.pdf
    • https://cdn.shopify.com/s/files/1/0432/9409/7576/files/83317086371.pdf
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/gedukov.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_off00008dd6.bin
f764b4b7a9abdc6d74cbe753631081467e711bd53d321944845432235b8e3bd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD6 5024 bytes
font_01_sfnt_off00009f03.bin
1515591411bd048ea2f980aaaae1747774f17db870a55f01dcc3de096489217f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F03 11216 bytes