Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cec6ab573cac87a…

MALICIOUS

PDF

37.1 KB Created: 2020-08-03 01:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 292d2461ea1d2ad9887d79812c1d244e SHA-1: a94a500d92e2b62be661a1ddc54f30ea8abc56ad SHA-256: 0cec6ab573cac87a43e08a17f65af0fc9d214a51b244d8515381f14ce602e9b0
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, suggesting an attempt to lead the user to a malicious site. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'marine corps drill manual'. The presence of multiple external PDF links, some benign and some unknown, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true destination.

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=marine+corps+drill+manual
    • http://files.lakotawesttheatre.net/uploads/1/3/1/6/131606201/fe81a8d79.pdf
    • http://files.nomsieswoodcrafts.com/uploads/1/3/0/9/130970008/lapaposagik_liwiz_folemupan_lawexene.pdf
    • http://files.acdavisbass.com/uploads/1/3/0/9/130969754/458cf81ed37.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/tawezes.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/29544499473.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pegumi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/kudozoruz.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/satozogotejekanifopitov.pdf
    • https://cdn.shopify.com/s/files/1/0439/7439/4014/files/dakakewadipixixawok.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/pusafagemusakarerixazeto.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/luxiraxaduvinexonikumeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/medebuxubumujoxosuzolu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59526866216.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/vajig.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/73284016340.pdf
    • https://cdn.shopify.com/s/files/1/0429/9027/2675/files/86863618866.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_off000054b4.bin
8844cb004bf057d508b9bf94fec1e0644f55ba67df4d3a050efaa1b75f203a62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54B4 5224 bytes
font_01_sfnt_off00006668.bin
0b6a0c191b690f36763cc010c71d0efe2c3849ecd0a466e2f859f629e4f77e9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6668 9804 bytes

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