Malicious PDF — malware analysis report

Static analysis result for SHA-256 e768a6349b1ac6a9…

MALICIOUS

PDF

40.6 KB Created: 2020-08-02 05:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efe0645b0db9724bc7b23234319dfc9a SHA-1: ff576bf2c197fa8b647a749e72a61b0fbb04ade5 SHA-256: e768a6349b1ac6a9a23e96a28058f068ef0f9a60451c4fcaf4ee28b845702521
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF files hosted on Shopify. This indicates a likely attempt to drive traffic to malicious infrastructure, potentially for further exploitation or phishing.

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=graco+nautilus+65+manual
    • http://files.msmacsschoolhouse.com/uploads/1/3/1/0/131070792/madoxor.pdf
    • http://files.carolyntourneyflorek.com/uploads/1/3/0/7/130739945/9975667.pdf
    • http://files.joandcooper.com/uploads/1/3/1/6/131636903/4397d1b466bd.pdf
    • https://cdn.shopify.com/s/files/1/0432/7810/6779/files/baofeng_uv_5r_programming_software.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/balevogigadan.pdf
    • https://cdn.shopify.com/s/files/1/0432/6277/1366/files/japisapigodibavifuvo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3407/files/18187277881.pdf
    • https://cdn.shopify.com/s/files/1/0430/5649/6791/files/lerixekof.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/23561252288.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pujipipokumamidepuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/86658176420.pdf
    • https://cdn.shopify.com/s/files/1/0445/2777/9999/files/yamaha_rx-_v673_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0817/files/60219564342.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_off00005528.bin
b467fd0a9894741452199b87a7e8d3fa8a1405dd5a1a133fa7139328387a7cc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5528 5256 bytes
font_01_sfnt_off000066f5.bin
0b20d156724725297109d203515ee7e27fd74439858d75e5fa476e8c0f26feef
pdf-font-stream PDF embedded font (sfnt) at offset 0x66F5 15188 bytes