Malicious PDF — malware analysis report

Static analysis result for SHA-256 790eb94b98e0aa95…

MALICIOUS

PDF

40.2 KB Created: 2020-08-02 23:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bedd3c84b0f5ae1af1f20c93b75403af SHA-1: 69ff50415e8fa54f7febdc895d1c841c45e40f40 SHA-256: 790eb94b98e0aa951d9ff2c1e2e42fba49801ad2d6837496e41bf265b6ddd7d2
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded external links, many pointing to a link farm hosted on cdn.shopify.com and a redirector on ttraff.com. The document body contains text related to setting up a local server, which is likely a lure to encourage users to click the malicious links. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=setting+up+local+server
    • http://files.robinsonelmwood.com/uploads/1/3/1/6/131606546/ec53a.pdf
    • http://files.multilingualacademybcs.com/uploads/1/3/0/7/130775384/temipaxotuzupem-fujaferajokif-nojibigomez-xamuwokaji.pdf
    • http://files.jamesgriffithsfilmmusic.com/uploads/1/3/0/7/130775361/695851.pdf
    • http://files.randirouge.com/uploads/1/3/1/4/131452949/xozagulodituwam.pdf
    • http://files.martagabrielaphotography.com/uploads/1/3/0/7/130740591/sezobijuto.pdf
    • https://cdn.shopify.com/s/files/1/0438/1691/1010/files/zilonojuzavelugaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/3804/7384/files/xisewuramatitarotawokigof.pdf
    • https://cdn.shopify.com/s/files/1/0437/0684/3288/files/jiwijevojisax.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/mupawopapodewo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2618/files/buletemunigo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/51156932819.pdf
    • https://cdn.shopify.com/s/files/1/0433/3492/6495/files/japipurigef.pdf
    • https://cdn.shopify.com/s/files/1/0433/7814/7491/files/gojaponajexem.pdf
    • https://cdn.shopify.com/s/files/1/0437/3266/4481/files/86893339495.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_off0000601f.bin
5cb9e66039dbe2ae66dffeabd0191531f7ac2a8e2a10885c82d78bc1f731aeea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x601F 5264 bytes
font_01_sfnt_off0000721e.bin
4c701cbb8ade580eb9633e6c2d855151bb8958e0d176113c300ad0d06974eaa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721E 10012 bytes

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