Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0e71f98f5d6268…

MALICIOUS

PDF

45.0 KB Created: 2020-08-11 19:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21873f82cf88968062d5cb04e508bfad SHA-1: bc07e0213894854338b770226003d52e2565fccd SHA-256: cc0e71f98f5d62686cca8cbd8bf7104c5167d6610eccf49abef5afc03c57f21e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical link redirects to a known malicious domain, ttraff.ru, with a keyword suggesting a lure for legal documents. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector confirms the intent to lead the user to harmful 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.ru/wb?keyword=durable%20power%20of%20attorney%20missouri%20pdf
    • http://sixituxu.lukascrafts-innosense.com/uploads/1/3/0/9/130969761/fusakupexij-tubag.pdf
    • http://rezoze.artistlesliepierce.com/uploads/1/3/1/4/131407440/vefudaxuxanize-vejofofin.pdf
    • http://files.merisonsporting.com/uploads/1/3/1/8/131871951/c60078.pdf
    • http://files.mutualaiddisinfection.org/uploads/1/3/2/6/132683330/5b45da22f72ad70.pdf
    • http://savobexa.sarahitkin.com/uploads/1/3/1/3/131380213/xuxesaxibul_bowikazefikoti.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/cara_belajar_saham.pdf
    • https://cdn.shopify.com/s/files/1/0443/8137/2582/files/docker_kill_container.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/10121107590.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7254/files/intravascular_complications_of_central_venous_catheterization_by_insertion_site.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2089/files/cooking_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6843/files/fixorasadipukogukixu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5623/3638/files/jijifawabaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/vukexojerapafaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/3762/9348/files/zogibefeludonuwifut.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/35845947691.pdf
    • https://cdn.shopify.com/s/files/1/0440/7610/5893/files/28254317187.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_off000071d4.bin
1aebd58c4bc61f677131716a47339be2199aa9d6d9470912660ba01987af90c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x71D4 5520 bytes
font_01_sfnt_off00008496.bin
d6cee7528206ed2459c7b67f6879a5731e001c1aaf10e2f6f7a781f9b6ed0b6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8496 10088 bytes