Malicious PDF — malware analysis report

Static analysis result for SHA-256 2867da550f05dddc…

MALICIOUS

PDF

41.4 KB Created: 2020-08-11 09:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b440203ea97447df023c657ca9de432d SHA-1: 4da5cb13ea8cc7dfc0800c3f462484dca15c3321 SHA-256: 2867da550f05dddc8e99278cb49d3839e39bd3167d432f162478d8157c7acdb7
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to converting word documents to PDF on Android, suggesting a lure. The presence of a link farm and a malicious redirector indicates a phishing or scam attempt designed to lead users to malicious content.

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.ru/wb?keyword=convert%20word%20ke%20pdf%20di%20android
    • http://files.paramountrec.com/uploads/1/3/0/7/130775827/wanuvawofi.pdf
    • http://files.artdistrictgallery.org/uploads/1/3/2/8/132816036/livowuxuxomajed.pdf
    • http://files.wanderingbydesign.net/uploads/1/3/0/8/130814208/ab6e9c9474.pdf
    • https://cdn.shopify.com/s/files/1/0429/0258/5500/files/geligebamopapirijororifa.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/xuriboxozulorogoditop.pdf
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/66771323004.pdf
    • https://cdn.shopify.com/s/files/1/0433/2073/7950/files/69039604479.pdf
    • https://cdn.shopify.com/s/files/1/0439/4962/1406/files/alfabeto_griego_historia.pdf
    • https://cdn.shopify.com/s/files/1/0433/4498/6280/files/madikutexutad.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4650/files/57899269876.pdf
    • https://cdn.shopify.com/s/files/1/0441/2456/9752/files/93215950367.pdf
    • https://cdn.shopify.com/s/files/1/0431/7632/9373/files/nefimalatul.pdf
    • https://cdn.shopify.com/s/files/1/0432/6958/7104/files/que_son_las_tecnologas_emergentes.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7305/files/26629709808.pdf
    • https://cdn.shopify.com/s/files/1/0441/1287/1576/files/zilogofozisekixexewume.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_off000065b9.bin
ed4d82d98470dc959756684ebac24647ee169c39956f18debb694457f7ca76ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B9 4944 bytes
font_01_sfnt_off000076b3.bin
14bc8a7b074349e19ba5ebf5158f51770d166cbfd1493de17740f66bb82105d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B3 10004 bytes

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