Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ff39f78a4708f2…

MALICIOUS

PDF

46.0 KB Created: 2020-07-30 11:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 054ac782346c595e1cfb3552a4f6a233 SHA-1: 751021ff73148e21efdce258427fe0686b2777d6 SHA-256: d5ff39f78a4708f2f8cda38fd9f9b92e4932e8d5a78b6422b926dfce85234731
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious redirector. The document body, though heavily obfuscated, appears to be related to a 'Tryst with destiny speech summary pdf', suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=tryst+with+destiny+speech+summary+pdf
    • http://files.bestbrokers.us/uploads/1/3/2/7/132740756/wolelikezep.pdf
    • http://files.midtntrailcam.com/uploads/1/3/1/4/131454521/popivofapiwow_nitujeletowane.pdf
    • http://files.neighborhoodparish.org/uploads/1/3/0/7/130776401/fatinodiv.pdf
    • http://files.neighborhoodparish.org/uploads/1
    • https://cdn.shopify.com/s/files/1/0433/5671/7224/files/2266788035.pdf
    • https://cdn.shopify.com/s/files/1/0434/7117/5846/files/gifuwotuvewonida.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/48425564241.pdf
    • https://cdn.shopify.com/s/files/1/0428/8138/4604/files/vexirisutakexa.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/zabotubivaromazoxuwilagow.pdf
    • https://cdn.shopify.com/s/files/1/0434/3257/5132/files/81273891692.pdf
    • https://cdn.shopify.com/s/files/1/0437/3974/2369/files/18858042067.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/ruxawegebomowafafa.pdf
    • https://cdn.shopify.com/s/files/1/0435/0777/7700/files/fekurutuxi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/najabebika.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2039/files/86304627439.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/wesowaresorusivo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/2406803199.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_off000076ea.bin
3bd97dc9720d1862f5b425c615734fbe8f14988ba83b97c27da4004df5594180		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EA 5276 bytes
font_01_sfnt_off000088b8.bin
31846d4d19ddb31ba49e772661cc68b8fe069b0ce8aeb6a654fb171826049faf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88B8 10052 bytes

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