Malicious PDF — malware analysis report

Static analysis result for SHA-256 701534c8dd53f6c1…

MALICIOUS

PDF

36.1 KB Created: 2020-08-23 00:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6a01666195a772ef7699afa6dc1dc0a SHA-1: cdbed527be82e6fed7d16aace50c49a4b0c450f6 SHA-256: 701534c8dd53f6c1785e31ff39c20a76af9a4ad2ddfdc033eccdd58864b9394f
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'office depot inkjet mailing labels template', suggesting a lure for phishing or malware distribution. The presence of multiple PDF links and a malicious redirector indicates an attempt to drive traffic to potentially harmful sites.

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=office+depot+inkjet+mailing+labels+template
    • http://files.pegasusclinics.com/uploads/1/3/0/8/130814101/rapigesugerujo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/70174280242.pdf
    • https://cdn.shopify.com/s/files/1/0430/0800/0163/files/lazax.pdf
    • https://cdn.shopify.com/s/files/1/0439/3979/1003/files/lududesi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4843/5861/files/64078760410.pdf
    • https://cdn.shopify.com/s/files/1/0433/8538/9212/files/49399816347.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/24376057765.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1699/files/82501041448.pdf
    • https://cdn.shopify.com/s/files/1/0432/8688/8601/files/network_cabling_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/9560/3862/files/16567902882.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_off00004ced.bin
1e1108cd52e7ebe930f7e973d2374a0ee7e346d1fedc9cb6f5212dd0802d378c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CED 5688 bytes
font_01_sfnt_off00006034.bin
05eeea55f9c63866132145061ba1167610b30d76c5465fcb5abd253cd7a3a46e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6034 10400 bytes

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