Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa6672885cb0119c…

MALICIOUS

PDF

45.8 KB Created: 2020-08-30 10:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f19a027b819c3306a6f75b23fc2f9298 SHA-1: 803b9ec32ed8862775f59bc51228fb096a21a006 SHA-256: aa6672885cb0119c7e99869d39d746a85c2ea22c32cc5305d1769f2caeee25bf
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, masquerading as invoice or manual documents, designed to lead the user to click on a malicious redirector. The primary malicious URL identified is https://ttraff.cc/wix?keyword=manual+dfd+pdf, which is flagged as a malicious redirector. The document body contains garbled text but includes the malicious URL and several benign-looking PDF links, likely part of a link farm to improve SEO and disguise malicious intent.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wix?keyword=manual+dfd+pdf
    • https://cdn.shopify.com/s/files/1/0440/5549/4806/files/aberdeen_airport_live_flight_information_departures.pdf
    • https://cdn.shopify.com/s/files/1/0434/6940/6360/files/ias_math_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/8516/7766/files/zanonerazaguxaku.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/16538141015.pdf
    • https://static.usrfiles.com/ugd/b8c837_5be36ac1631b4b15bfdcc26c2d20537c.pdf
    • https://static.usrfiles.com/ugd/e3834b_afa4bc73362f48479aba0c712dcdffec.pdf
    • https://static.usrfiles.com/ugd/b8c837_30c2c394a7de43c1b808a586a801eb80.pdf
    • https://static.usrfiles.com/ugd/b8c837_35eddabeec164694aa16ed90af27fc0c.pdf
    • https://static.usrfiles.com/ugd/d54300_e0ef6cc0736b4cf6bf80ceafc283474c.pdf
    • https://static.usrfiles.com/ugd/865d50_b72177d12a7a47dcae7d09ca905aefa2.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_off00007846.bin
edaa392c2d1114a465d4d7b6493d32322390152eb9351d62fc81abf527115148		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7846 4764 bytes
font_01_sfnt_off00008896.bin
f7795ae765f08166a1d1121882fc404c392a395565b2a2f75be98748cfb87ebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8896 10244 bytes

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