Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b91f7804275c33…

MALICIOUS

PDF

42.7 KB Created: 2020-09-01 00:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5be70002984eaef5e3bd467603038a45 SHA-1: 8e7c839dc28d6027cced18552e57539d28fe8eab SHA-256: 07b91f7804275c33e203b408bb42f83423fabf3f8e436625566edd966522dc46
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many pointing to benign content, is characteristic of SEO link farm techniques used to obscure malicious activity.

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.club/pify?keyword=how+to+speak+american+english+fluently+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b11f6d_0338f0996b0d49f1b8930680af3c2421.pdf
    • https://static.usrfiles.com/ugd/b8c837_31e17141cec84f3680680dc50bba2ba8.pdf
    • https://static.usrfiles.com/ugd/8b97dd_b6cda2b4b5c14ba5a6ee16bcefdbb663.pdf
    • https://static.usrfiles.com/ugd/f4de5e_c8749c249ae44dce924b017dced0b097.pdf
    • https://static.usrfiles.com/ugd/9a242c_86519f6c8e414a76a4902fed25818c0a.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5562/files/dubiro.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/gijuvulanifudisurenizaxig.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/50127192384.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6164/files/45678318020.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/pandas_save_csv.pdf
    • https://cdn.shopify.com/s/files/1/0435/9041/8589/files/81550422332.pdf
    • https://cdn.shopify.com/s/files/1/0447/1003/5609/files/bipartisan_campaign_reform_act.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1671/files/fusion_generator_fallout_76.pdf
    • https://cdn.shopify.com/s/files/1/0460/1272/7457/files/93869964526.pdf
    • https://cdn.shopify.com/s/files/1/0437/2054/0310/files/solver_add_in_excel_2013.pdf
    • https://cdn.shopify.com/s/files/1/0438/5017/0530/files/dovulat.pdf
    • https://cdn.shopify.com/s/files/1/0430/7202/8823/files/vuvefokasapetibozoke.pdf
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/runulosojolas.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_off00006828.bin
0109b59355a3a71f29868198026f5cb3d0fd805cae4e72a6de910f1006a3f0e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6828 5788 bytes
font_01_sfnt_off00007bc4.bin
bdfc07b060f32296fe90bea223f396b091d5003e2315d977783ba350ab696ecf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC4 9932 bytes

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