Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ff68ee79e59631…

MALICIOUS

PDF

58.1 KB Created: 2020-08-20 19:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2eb27681bbd88ae10b72a59a6e93cd18 SHA-1: 5da9e9fbf46fe043176d2c2bf2768795a5ba2891 SHA-256: 66ff68ee79e5963107c30df18200de0609a3f16405b7429f1d46060e6c0645e0
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body also contains this URL, suggesting an attempt to trick users into believing they are accessing free templates. The ML classifier strongly indicates maliciousness, and the presence of numerous Shopify links, while mostly benign, could be an attempt to blend in or appear legitimate.

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=gif+ppt+templates+free
    • http://vadezov.polymathworkshop.co.uk/uploads/1/3/0/9/130969539/fusowe.pdf
    • http://files.dcmspto.org/uploads/1/3/1/4/131438203/a9d309.pdf
    • http://files.rautoulab.com/uploads/1/3/1/3/131398244/fc9cefb108d0e27.pdf
    • http://bupukob.martinsrestaurantcayucos.com/uploads/1/3/0/7/130739616/faxekabi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/tv_guide_buffalo_ny.pdf
    • https://cdn.shopify.com/s/files/1/0438/3119/7856/files/human_body_systems_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/8873/1543/files/galiwatukozaxisusixa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0260/files/jisuxeninixirujewebuteloz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/fajadise.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/centum_vp_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/4910/6073/files/10303946533.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9236/files/legasanepofa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4869/files/moziximigetadilop.pdf
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/zoriwofipisajewadupesovek.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/nazudu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2140/9184/files/15435235406.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_off0000a7a4.bin
1c646ef4400b3e981d13f27ffd2cee28c556f69107ddd93544a9aa0a879b34ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7A4 5076 bytes
font_01_sfnt_off0000b8d6.bin
89e0992616ac66d73d3ae945b268493e1b6f63eeb2b83b65e0c688d545ba7625		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D6 10212 bytes

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