Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36671e7e9732245…

MALICIOUS

PDF

43.5 KB Created: 2020-08-23 10:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9da3a30de65219ac67ccf9d8f528fff SHA-1: 4524b857a0425be2b6da91f38136c334fc6df725 SHA-256: a36671e7e973224560776dfc6f853a0a6e218498ab173c939bfb4d86a37e5cbc
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=searchview+menu+android+example, which is likely used to redirect the user to a malicious site. The presence of numerous other links suggests a link farm or a broad phishing attempt.

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.com/pify?keyword=searchview+menu+android+example
    • http://files.wefightforfood.com/uploads/1/3/0/7/130740257/jizase.pdf
    • http://files.oriental-collection.com/uploads/1/3/1/3/131380305/9ee94b9ba6.pdf
    • http://files.queensweepers.com/uploads/1/3/1/6/131637484/17237c9ee81e99e.pdf
    • http://files.bullvilleanimalhospital.com/uploads/1/3/1/6/131637016/rasofebaketo-mikabinakinadum-zimezumuw-sisokaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8090/files/raluvatugimex.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/78011764566.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7253/files/witisilose.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/75098952896.pdf
    • https://cdn.shopify.com/s/files/1/0433/8388/1893/files/asmaul_husna_bangla.pdf
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/rudado.pdf
    • https://cdn.shopify.com/s/files/1/0439/4736/0424/files/jobitagasevela.pdf
    • https://cdn.shopify.com/s/files/1/0429/1290/7427/files/bazodowakawanare.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6549/files/auditoria_informatica_mc_graw_hill.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/tamewaruvelovuker.pdf
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/biochemistry_proteins.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/classic_human_anatomy_valerie_winslow_download.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_off00006208.bin
26965f16e80e96e86c4bafaa53408a8e6041ca5b92df6714fe443e4d423023e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6208 5456 bytes
font_01_sfnt_off00007484.bin
88e9dac2972f76e0c1804c7d8946d152011b031175f788f72104834a002fe889
pdf-font-stream PDF embedded font (sfnt) at offset 0x7484 14212 bytes