Malicious PDF — malware analysis report

Static analysis result for SHA-256 0634a6f49bc91cc2…

MALICIOUS

PDF

46.0 KB Created: 2020-07-27 21:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 724817b9208140f801b8f9f6af39f304 SHA-1: e0593220d4ee932ecf73f1da5ef563aa9c54ccb5 SHA-256: 0634a6f49bc91cc24c614f3698bad2e4f579c382e49d70a0654d782519134f7c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, suggests a lure related to 'cinema box not working android', likely a pretext to encourage clicks. The presence of a download button heuristic further supports the idea of a deceptive download or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=cinema+box+not+working+android
    • http://files.frontierprojects.org/uploads/1/3/1/4/131409055/kuliwazesivo.pdf
    • http://files.aberdeenlatinschool.com/uploads/1/3/2/7/132740564/66c3aeb1e9.pdf
    • http://files.laurenswildliferescue.org/uploads/1/3/2/6/132695738/2906118.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/55538087943.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/xazen.pdf
    • https://cdn.shopify.com/s/files/1/0439/4693/4430/files/namavixemopiwinosin.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/welomomafevavopevetuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/37260920625.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/66255902414.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4496/files/48650050355.pdf
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/saluwiwekubowumidavanob.pdf
    • https://cdn.shopify.com/s/files/1/0437/2257/1930/files/ganixetu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/gexosujufepe.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/xunipopubividere.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65039204935.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/rakipolititajuneratoraj.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076aa.bin
3f068d6160f15655fb7b7fa816498ac6240dd62b737fc7f60c72f9fa3a8e636d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76AA 5108 bytes
font_01_sfnt_off000087fd.bin
7bb1a6b32a084dae8b95dc82e0a5dff15b226bf6c98a65e15f0efbd6bcd7cce9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87FD 10232 bytes

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