Malicious PDF — malware analysis report

Static analysis result for SHA-256 e77b83444049a2a4…

MALICIOUS

PDF

33.3 KB Created: 2020-08-20 05:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b0608e3bfe09cc9c919193624c4c4ed SHA-1: e48e4eb1dc9311b80263afe030f9c9989f6e5ee2 SHA-256: e77b83444049a2a4ab1ce6ce518057bf42edc2bbae9a103cb1f1b70fef294855
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The document body explicitly mentions 'Angry birds rio 2 apk' and contains the malicious URL, suggesting the intent is to trick users into visiting the redirector. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=angry+birds+rio+2+apk
    • http://sofeg.stonevalleyarts.org/uploads/1/3/2/7/132712572/7882354.pdf
    • http://mekaru.peacemedie.com/uploads/1/3/2/7/132712116/taxete_rutogejozizixir_tufufoko_wovapoxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/xivifoxidutotazazidexiwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3078/9800/files/lekiwajugopiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/8504176893.pdf
    • https://cdn.shopify.com/s/files/1/0440/0644/1110/files/93339485429.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/78410390156.pdf
    • https://cdn.shopify.com/s/files/1/0443/3759/4524/files/statistical_analysis_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0554/files/baahubali_2_tamilgun_hd_movie.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_off0000438a.bin
862217c2256a8018ee0a14e2e4ba988e985b01f787243aea23baeae736ab09bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x438A 5524 bytes
font_01_sfnt_off00005668.bin
49c5053c6e71af3f5383425db827af79ecaa0ff44b11ff0b07c7d128100ed556		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5668 10180 bytes

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