Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddaa4223966a057a…

MALICIOUS

PDF

41.3 KB Created: 2020-08-20 00:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be596d82c245216a878c6dd4603732c4 SHA-1: fd7ea964cc7120ed637cb10ba2eff43929fe2176 SHA-256: ddaa4223966a057a5f9b8a484199c5fcbbe329851a0857d305d1c53e40ba2e30
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicating a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=psoriasis+diet+pdf. The document body contains garbled text but also includes the same URLs found in the heuristics, reinforcing the malicious intent. 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.ru/pify?keyword=psoriasis+diet+pdf
    • http://files.kelownaplumbingsolutions.com/uploads/1/3/1/3/131398156/vudejinu-kedav-benosagulita.pdf
    • http://jexolos.marianmaguire.com/uploads/1/3/1/4/131407227/1917702.pdf
    • http://betimak.putnamchurch.org/uploads/1/3/0/7/130776885/5430332.pdf
    • http://kejoveke.venuevaletusa.com/uploads/1/3/1/4/131437515/fa29a44142b6.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/51318733915.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/39070646544.pdf
    • https://cdn.shopify.com/s/files/1/0433/7529/6670/files/lakoguwotewirol.pdf
    • https://cdn.shopify.com/s/files/1/0428/6873/6166/files/21519170727.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/gujulolikusozadifa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5708/files/jitawemazipadesimunumuxus.pdf
    • https://cdn.shopify.com/s/files/1/0431/6279/6186/files/gumona.pdf
    • https://cdn.shopify.com/s/files/1/0433/7565/7110/files/93677958443.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/demexo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6465/3984/files/paselomagopa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/51639845337.pdf
    • https://cdn.shopify.com/s/files/1/0432/0280/5921/files/jegisebekebabupegobezuxut.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8333/files/cable_car_map.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_off00006561.bin
5cc456b6d09037717676f9fe317106e84068c5bdcf523233b72d67ea913f42ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6561 5004 bytes
font_01_sfnt_off00007674.bin
a575e216c5e84159d36e743d2965f0fda76201ce336d0bbe60d8e767bcd3651d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7674 10020 bytes

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