Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ada80665a5b34e…

MALICIOUS

PDF

40.8 KB Created: 2020-08-04 05:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa9d5ac0de23df693ffbb92017ac532a SHA-1: 9905d87238f9014fd9b6042f7fdb8978183293fa SHA-256: 09ada80665a5b34e9e1cfc6a65d9b391ef6044be9ac77e63c67a2cccb1a8261e
154 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 external resources, suggesting a link farm or redirection strategy. One prominent URL, https://ttraff.com/pify?keyword=past+perfect+tense+worksheet+pdf+with+answers, is identified as a malicious redirector. The document body, though partially obfuscated, contains text related to a worksheet and the malicious URL, indicating a lure to direct users to potentially harmful content. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a phishing or malware distribution attempt.

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.com/pify?keyword=past+perfect+tense+worksheet+pdf+with+answers
    • http://files.evolutionprep.com/uploads/1/3/0/7/130739986/1043932.pdf
    • http://lovugugof.fromtheboulevardtoday.com/uploads/1/3/1/8/131872225/warenax-mubim-boworapusola-zimaralujepav.pdf
    • http://files.morningrosehouston.com/uploads/1/3/2/6/132695568/8957897.pdf
    • http://files.minihorsedriving.com/uploads/1/3/1/1/131163976/f3d2b53e811a267.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0844/0990/files/woganaregit.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/32905673970.pdf
    • https://cdn.shopify.com/s/files/1/0440/3914/3574/files/76128114679.pdf
    • https://cdn.shopify.com/s/files/1/0429/7401/9740/files/zatud.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/tozekabufataribog.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/95635361556.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/wokapudikubewo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mutiga.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/6450340281.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/bejifilesasadafezisumu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4501/9045/files/sbi_credit_card_statement_password.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/jexapovulilanofasidek.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_off00006043.bin
c60217b7913c328dc5359815b4a5ab6e4b7a997bc62aeb16823e98e5757d3cc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6043 5368 bytes
font_01_sfnt_off00007296.bin
3e5d3453509c007436bd81907cb8efb6725ebe9bed625b55a4825173ec544bcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7296 10412 bytes

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