Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb184e5ef89672a…

MALICIOUS

PDF

44.1 KB Created: 2020-08-20 18:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03d6a93fd0dad7fc72ca17fc71379638 SHA-1: dc44a432a47011a01eb5441ff55bb95d5521026c SHA-256: 3fb184e5ef89672a98bbcc46aa5269cfd93cfac21a16729092693a1481bbe9a2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, disguised as 'Google search engine evaluator guidelines', redirects to a malicious URL (https://ttraff.cc/pify?keyword=google+search+engine+evaluator+guidelines). This indicates a social engineering attack aiming to redirect users to malicious infrastructure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=google+search+engine+evaluator+guidelines
    • http://files.jakspp.net/uploads/1/3/0/7/130776366/7535618.pdf
    • http://mijalep.civility-project.com/uploads/1/3/0/7/130739777/08f1b88e123683.pdf
    • http://files.stayingsharpasasenior.com/uploads/1/3/0/7/130739154/suguvafixenalam-sirimutasavel-joxefosa-nujigolaj.pdf
    • http://files.tracethemitten.com/uploads/1/3/1/1/131164202/fujugusobofi_buvevedukitip.pdf
    • http://wogawu.whittaylorcomics.com/uploads/1/3/1/3/131383965/dinopigedo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1717/3149/files/nenajaxolugolavajorola.pdf
    • https://cdn.shopify.com/s/files/1/0438/6547/3184/files/26562695340.pdf
    • https://cdn.shopify.com/s/files/1/0428/5811/9334/files/86302843199.pdf
    • https://cdn.shopify.com/s/files/1/0438/9987/9576/files/505738218.pdf
    • https://cdn.shopify.com/s/files/1/0447/8782/6854/files/tovawarume.pdf
    • https://cdn.shopify.com/s/files/1/0434/6095/2229/files/english_words_meaning_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7555/files/75780116977.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/adobe_premiere_tutorials_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6757/files/rujusutetubonobupudur.pdf
    • https://cdn.shopify.com/s/files/1/0431/8402/9845/files/functional_analysis_exercises_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/mathematical_modellingdrive.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_off00006b85.bin
4b5b96ed1c860d3ef96e1b412f2ca6fad62d33e2359b83e6dee8cb3348154a57
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B85 5292 bytes
font_01_sfnt_off00007d85.bin
078c99fb29624d1d5a00ea4c336c12b6a0e146d7f47baa99d9e71e53cbffaa25
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D85 11024 bytes