Malicious PDF — malware analysis report

Static analysis result for SHA-256 4697e8cb31a36d91…

MALICIOUS

PDF

39.3 KB Created: 2020-08-23 18:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a43d3d6a79e6b1121f087d072269e260 SHA-1: 4d5701b5f05b7920c63c5db6566af7c053e104c9 SHA-256: 4697e8cb31a36d914dc8ea173a4cbb54cfe33c1ae5c44ff93fc750ee2a8cf054
150 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious URL, disguised with text related to 'Vs code extensions as vsix'. This suggests a phishing or social engineering attack aiming to redirect the user to malicious content. The presence of a link farm further indicates an attempt to manipulate search engine results or distribute malicious links broadly. No scripts were extracted, limiting the analysis of direct payload execution.

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=vs+code+extensions+as+vsix
    • http://files.thesportscardguy.com/uploads/1/3/0/7/130740323/5431843.pdf
    • https://cdn.shopify.com/s/files/1/0439/3949/6094/files/brandy_another_day_in_paradise_remix.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/74188678294.pdf
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/juluxogalanoju.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/libigule.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/xaxam.pdf
    • https://cdn.shopify.com/s/files/1/0434/4958/1724/files/belafozawaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/astrology_for_the_soul.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1173/files/2060567708.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/fizomemogezududo.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_off0000573c.bin
a989184d6c2993d461dd1aa63832273a5119936a65d236049280e993643d82fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x573C 4900 bytes
font_01_sfnt_off000067fd.bin
b7c8990ef0b75d599ebe86233aba67ff04a2cc6ad16e72effe5df6f3b7ed5608		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67FD 12828 bytes

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