Malicious PDF — malware analysis report

Static analysis result for SHA-256 694b5c989fb67c5c…

MALICIOUS

PDF

62.8 KB Created: 2020-08-22 05:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdbc372ff9649785445a27fb61e43948 SHA-1: ff04c5baf911a55b9a5f90263c7ad897ff75a2d6 SHA-256: 694b5c989fb67c5c28e3cc186cdb352c235c909fa2ec291741f462aa57369463
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=alcatel+idol+4s+android+7'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links. The presence of urgency language further supports a phishing or scam attempt. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=alcatel+idol+4s+android+7
    • http://files.nespractitioners.com/uploads/1/3/0/9/130969166/3511121.pdf
    • http://mobepe.greencambridge.org/uploads/1/3/1/6/131606289/8221299.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/91362627299.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/borenatokobi.pdf
    • https://cdn.shopify.com/s/files/1/0460/0692/7527/files/minimalist_cv_template_free_psd.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2746/files/2040_john_deere.pdf
    • https://cdn.shopify.com/s/files/1/0429/2807/9004/files/vidmate_for_android_device.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/wilejunabepudix.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/allegra_suspensao_bula.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9808/files/41886323327.pdf
    • https://cdn.shopify.com/s/files/1/0441/1860/5976/files/88579886801.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/xaxumawejepezasepuka.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/favabuxewesonegimonuvoj.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_off0000aecc.bin
674a304a40963f911dc11c322223f87425201fed6ec67e3a7ca2617dd2c2f7c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAECC 5092 bytes
font_01_sfnt_off0000c026.bin
4a17a348a0fd37cc061fbfc6790674dd116453418730e16fe571170c242a4390		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC026 14640 bytes

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