Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d1ad35b74667e6…

MALICIOUS

PDF

38.7 KB Created: 2020-09-16 16:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae0dcee45e5efb7f8a8523f2cb0b513b SHA-1: 260c84b04e93f2662def428b246290aaf4c26750 SHA-256: 97d1ad35b74667e62b5b80302c08dd2db8c88b677778cc88863beedfa374a601
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a common technique for SEO poisoning or redirecting users to malicious sites. One of the primary links, 'https://ttraff.me/wix?keyword=patrick+keeler+actor', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the link farm and redirector are sufficient indicators of malicious intent.

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.me/wix?keyword=patrick+keeler+actor
    • http://files.sjshanover.org/uploads/1/3/1/4/131438708/tinejumi.pdf
    • http://tesomik.chaddertontogether.co.uk/uploads/1/3/1/4/131453133/fatapadajuz.pdf
    • http://files.makersguildinwales.org.uk/uploads/1/3/0/7/130739162/nafuzosobirikuxud.pdf
    • https://7d5dce2e-43bf-463a-96dd-d08a66fee99d.filesusr.com/ugd/64bd79_d5045ec3d2d34dbfaa8edfe694732006.pdf?index=true
    • https://6f945894-da8b-479f-a05c-a98dded5cac5.filesusr.com/ugd/8da65f_345ec37775a4475e88f2f58c8d4e6532.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/8250/4600/files/oracle_sql_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/6567/8755/files/41260044480.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/on_android_tablet_reviews.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/corel_motion_studio_3d.pdf
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/torufekix.pdf
    • https://cdn.shopify.com/s/files/1/0436/5513/5390/files/jizimofedagokuvejug.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000473b.bin
31196872614959ecb2edbbf2eabbac5057ca71e484bd1013fe91ec631fdb8f82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x473B 4680 bytes
font_01_sfnt_off00005735.bin
049d1a0bf3fe6cd70f899609b49817764b6407ff7381a16c01f3c789a8a48657		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5735 9852 bytes
font_02_sfnt_off0000793b.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793B 16092 bytes

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