Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee76914cd1354ca…

MALICIOUS

PDF

41.4 KB Created: 2020-08-23 17:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5df3f2bc27038588c77a289535a9f9b SHA-1: 741f9f61ab6e32b49a05a67296289244b7c248cd SHA-256: fee76914cd1354ca5a66a59db2af4895b11d01d839b77566aa3eac8618c6396b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=beginners+guide+to+chakra+meditation'. This URL is embedded within the document body, which also contains numerous other links to PDF files hosted on various domains, indicative of a link farm. The ML classifier strongly supports the malicious verdict. The primary attack pattern involves luring the user to click the malicious redirector.

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=beginners+guide+to+chakra+meditation
    • http://zalizive.joyblendedhealing.com/uploads/1/3/1/0/131070420/lagedafipanet-rikinumo.pdf
    • http://files.drmartinandrew.com/uploads/1/3/0/7/130775592/56f0585f314.pdf
    • http://juniluve.yourfinancesource.com/uploads/1/3/1/4/131437792/557a327918fe5.pdf
    • http://files.shortbeachdays.com/uploads/1/3/1/4/131453215/9032ae.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/42230999061.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/94073122548.pdf
    • https://cdn.shopify.com/s/files/1/0436/7679/5030/files/xabagilofinunemud.pdf
    • https://cdn.shopify.com/s/files/1/0432/1063/7476/files/49895715708.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bibekejufalakudogaloseja.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/rifem.pdf
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/95649817481.pdf
    • https://cdn.shopify.com/s/files/1/0434/5584/0422/files/dedowomikexajanena.pdf
    • https://cdn.shopify.com/s/files/1/0434/8978/8069/files/terolezujoginozivikolumij.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/structure_of_ebola_virus.pdf
    • https://cdn.shopify.com/s/files/1/0435/6921/7699/files/partnership_deed_format_download.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_off0000631e.bin
701add2e16f8c93a2a49d1c6801097dc1076b7936f50f0d8341beb599ae5d6d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631E 5432 bytes
font_01_sfnt_off0000756c.bin
269226f8e606585baf19bfb3252df1c2415c71e164a1baabfc46aa0016cc024d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x756C 10300 bytes

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