Malicious PDF — malware analysis report

Static analysis result for SHA-256 284bbb813eb9e4b0…

MALICIOUS

PDF

110.5 KB Created: 2020-09-18 10:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d3a70eaf04654aab9c1ce52cf16cf9d SHA-1: c09d5cb5f117d8488a2b8e9547cfccbcebc9f588 SHA-256: 284bbb813eb9e4b0f084798418449678eb48f0c8d0bfc03d87a3f09569c89c9a
128 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and a critical heuristic firing for a malicious redirector link. It also exhibits characteristics of a PDF SEO link farm, with numerous links to external PDF documents. The primary malicious URL identified is ttraff.ru, which is used in conjunction with keywords suggesting a lure for game-related downloads. The embedded document body text is heavily obfuscated but contains the malicious URL.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/wix?keyword=survival+chaos+wc3+download
    • http://files.keithgreenough.com/uploads/1/3/1/8/131871849/37fcdea2f929d00.pdf
    • http://reredi.plastersurrey.co.uk/uploads/1/3/2/3/132303388/0377d8a8.pdf
    • https://5bbad7f9-1c9e-4178-9af1-a6a8589c5fa2.filesusr.com/ugd/5b1e3c_32ffca99ac244e3b8ba2496c50fc52e8.pdf?index=true
    • https://1b3b383b-9f51-45bc-bc39-93c9bf571f09.filesusr.com/ugd/086daf_ab5c345008a845ed8d1e9f47d2e30783.pdf?index=true
    • https://2ea2beed-e086-4260-9744-c3a215d7c1e7.filesusr.com/ugd/b80405_540048ce39354b23b7f80fa220220a4c.pdf?index=true
    • https://42c58796-45ab-48c8-b5f3-208754c915de.filesusr.com/ugd/724fb5_879a5eaf80dc4c58a5400babd0a42208.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0451/1399/9512/files/ahad_nama_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/0332/8150/files/anna_digilio_guided_math.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/riwefuxapinomenifofizosu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/ridufixugidor.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/82412877570.pdf
    • https://6c244f5c-e64c-49e3-a56a-378d2530034f.filesusr.com/ugd/1acd69_72958b5bcad94f19bceccb5c69899866.pdf?index=true
    • https://db95c105-d8c7-46f1-9ddd-13923d4579fc.filesusr.com/ugd/353d00_093e48a98612433cad082a2810360015.pdf?index=true
    • https://d97cfc2a-a3c6-4bd7-b406-637e03eaf3f8.filesusr.com/ugd/bf0735_1cca1465c2fc40dba6e23796cf255caf.pdf?index=true
    • 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_off00017536.bin
074143da592b19127ba7091c486c09a196331e7e498afe550afb8d5e2ad6216a
pdf-font-stream PDF embedded font (sfnt) at offset 0x17536 5448 bytes
font_01_sfnt_off000187c4.bin
a0b64a064de2b3af569ba6ec90de4bb8752fa94d0e9fca109e5ead92e345d6f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x187C4 10808 bytes