Malicious PDF — malware analysis report

Static analysis result for SHA-256 393697d839ad61d4…

MALICIOUS

PDF

41.9 KB Created: 2020-08-14 05:39:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ccc99c25a60b8a2bd059c7a8c48d7d0 SHA-1: acdfc99a710cecd1633447a8bac13070c33b1e08 SHA-256: 393697d839ad61d4ed3a5534b3e5865585baa49a408b969ecc769d9d5b9638a9
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=tencent+game+buddy+install+apk'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier also strongly indicated maliciousness. The primary malicious URL is a redirector likely used to funnel users to a download or phishing page.

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=tencent+game+buddy+install+apk
    • http://lilalum.fundamentallysoundbasketball.net/uploads/1/3/0/7/130775643/boguremomovumezi.pdf
    • http://fibapi.unitedworkerscongress.org/uploads/1/3/1/4/131407164/6971694.pdf
    • http://files.thehonestcatholic.com/uploads/1/3/0/8/130873921/3064113.pdf
    • http://files.christophervonspitzer.com/uploads/1/3/0/7/130739155/6994799.pdf
    • https://cdn.shopify.com/s/files/1/0434/4512/5281/files/2011_ford_escape_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1438/8888/files/tutorial_guide_to_autocad_2016.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/daft_punk_discovery_zip.pdf
    • https://cdn.shopify.com/s/files/1/0436/2174/4803/files/pevul.pdf
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/81431494260.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/bhagavad_gita_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/multivariable_calculus_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/2171/4079/files/99847643446.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91146339154.pdf
    • https://cdn.shopify.com/s/files/1/0438/3332/7776/files/mosoliwisak.pdf
    • https://cdn.shopify.com/s/files/1/0433/5783/1326/files/22270240033.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/kosemizeferepanegopan.pdf
    • https://cdn.shopify.com/s/files/1/0438/1245/4560/files/36150357210.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_off000065bf.bin
23b04a1f9c4f684f20ebbbe05eb5762768db7782c824860f0c19f68986b40b5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x65BF 5552 bytes
font_01_sfnt_off00007892.bin
4aff255aef91c81ccc72b2221aa886c5d8d737f571bf7b3347188f6c6fe0f542
pdf-font-stream PDF embedded font (sfnt) at offset 0x7892 10016 bytes