Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c43e0a2ee2d5d51…

MALICIOUS

PDF

51.4 KB Created: 2020-08-01 15:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3be3932cdd87f025eefa8b81b4604963 SHA-1: b8b6146c2387e9a61b8b431e3135e8718a7a8f5a SHA-256: 6c43e0a2ee2d5d516726187efa139fb5b866cea212ecd4d8678c0e3127e2d2de
174 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though partially corrupted, mentions 'Brinks digital deadbolt user manual', likely a lure to entice users to click on the embedded links. The presence of many PDF links and a malicious redirector indicates a link farm or redirection scheme designed to lead users to malicious content.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=brinks+digital+deadbolt+user+manual
    • http://files.helping-sa.co.za/uploads/1/3/1/4/131482946/5181321.pdf
    • http://files.ksdsscience.com/uploads/1/3/2/7/132710780/monakanewoxoxu.pdf
    • http://files.morrowtimes.com/uploads/1/3/1/3/131384374/xovez.pdf
    • http://files.brunstaneproductions.co.uk/uploads/1/3/1/3/131379295/bubazuzijedufim.pdf
    • http://files.artlynchactingcoach.com/uploads/1/3/1/3/131380868/tagaxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0240/4769/files/87651157635.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/67560040524.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdf
    • https://cdn.shopify.com/s/files/1/0430/3021/6855/files/zizaboweletatixopuxewebum.pdf
    • https://cdn.shopify.com/s/files/1/0434/0809/7445/files/lowegagevapuwojek.pdf
    • https://cdn.shopify.com/s/files/1/0437/0595/8565/files/pifozajegiwof.pdf
    • https://cdn.shopify.com/s/files/1/0434/2012/3293/files/83497124979.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/jixitorosazuzadobo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/47582430912.pdf
    • https://cdn.shopify.com/s/files/1/0429/9427/0371/files/punubixelulufuwe.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_off0000847c.bin
81663da17046f7a76a201fd14c76054c33426aa2825b57b225be4b2d029c8bdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x847C 5396 bytes
font_01_sfnt_off000096c4.bin
ad7ba8f3813557e06677fea8bba0c748737745ac7ee934cd5bf75bfe8e367d5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C4 13224 bytes

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