Malicious PDF — malware analysis report

Static analysis result for SHA-256 e567e07dca6316e5…

MALICIOUS

PDF

47.1 KB Created: 2020-08-14 02:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d857459a3647bb53011e672a4d0fa16a SHA-1: 06d61811e6650a1e926ba11fd2bfda1452449e23 SHA-256: e567e07dca6316e55be8ffac84edc9a9800f83d5279cd056415a40432e260adc
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains the URL 'https://ttraff.cc/pify?keyword=famille+nombreuse+catholique+reportage', which is likely used to redirect users to a malicious site. The presence of a link farm suggests a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=famille+nombreuse+catholique+reportage
    • http://files.geopoliticalobserver.com/uploads/1/3/1/4/131453015/1ffd37cbd.pdf
    • http://files.windridgeschoolhouse.com/uploads/1/3/1/8/131871605/7375250.pdf
    • http://files.drgigisrmuf.org/uploads/1/3/1/6/131637168/jufosomitup.pdf
    • http://files.travelingdoves.com/uploads/1/3/0/7/130775116/fuwosidogupe-jusebafoxerip-zaxopukivuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/tojilemud.pdf
    • https://cdn.shopify.com/s/files/1/0432/7679/6057/files/kigonulumekobudapiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7174/files/limerem.pdf
    • https://cdn.shopify.com/s/files/1/0439/4106/8958/files/nuwepadasotumezezuzemudo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7674/files/62671635842.pdf
    • https://cdn.shopify.com/s/files/1/0428/6221/5324/files/50060676197.pdf
    • https://cdn.shopify.com/s/files/1/0428/7882/8700/files/2008_jeep_liberty_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7866/files/vivodepu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6966/8517/files/97325629721.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/3338080583.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_off00007479.bin
7230bd24b91a0ed00cecb9bcea60d59eebe16244cccd621833d975996acd11b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7479 5568 bytes
font_01_sfnt_off00008736.bin
e66aa9411fe6e87ca5824a95d50abd267fedc9f58be221592c62241169847491
pdf-font-stream PDF embedded font (sfnt) at offset 0x8736 12512 bytes