Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e6886b986fb636…

MALICIOUS

PDF

45.1 KB Created: 2020-08-20 06:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7646699fedff66569b265e0d2f7cfe8 SHA-1: 8e68ea2f41a53b5cb9c25f458747ba5797e347b2 SHA-256: 16e6886b986fb63666fdb7147b3a008da7704e082f783bdb9d47397de9608aa3
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though partially corrupted, includes text suggesting a lure related to 'Aapl upcoming earnings report' and embeds URLs that are part of a link farm. The presence of embedded URLs and the heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicate that the primary function of this PDF is to redirect users to malicious content, likely for phishing or malware distribution.

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=aapl+upcoming+earnings+report
    • http://weteginus.fountainheadmuseum.com/uploads/1/3/1/6/131606577/tezesudunidiwo.pdf
    • http://kimovuzu.sydneymcneillwrites.com/uploads/1/3/2/3/132303382/fubevomeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/4607/5542/files/elcomsoft_ios_forensic_toolkit_cracked_rar.pdf
    • https://cdn.shopify.com/s/files/1/0431/2121/3591/files/27446296589.pdf
    • https://cdn.shopify.com/s/files/1/0432/4520/7714/files/2976835112.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/5000687078.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bifivejeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3499/files/bovizumobakam.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9787/files/15778109737.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/wutowomuza.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/vebipoxarokexofupere.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/leah_edelstein_keshet_mathematical_models_in_biology.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/artificial_intelligence.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000635d.bin
7022d16c6dad94f529789064e8aa18c3fc4f9e5573ca4a4577c711eec97e4907		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635D 5124 bytes
font_01_sfnt_off000074a9.bin
9da92052bb6043af97dcdc61c4215efc8d29c6c7169fc17e97052a12fe8a8f14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A9 10776 bytes
font_02_sfnt_off0000998c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x998C 4324 bytes

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