Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec8bca5eca53e78…

MALICIOUS

PDF

45.2 KB Created: 2020-08-31 06:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 127c3549027b6dcbc61db66cde3036ff SHA-1: 9b0fc15be5761db88a1f990a5c66c2d6a42e8d16 SHA-256: 0ec8bca5eca53e784626dbbc1fcf65638c1753883d41afc3facbcfb15672ffe7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=normes+sociales+d%25C3%25A9finition'. Additionally, it features a PDF link farm with numerous links, many of which are to Shopify, but the primary redirector is highly suspicious. The document body contains obfuscated text and the malicious URL, suggesting an attempt to lure users to a harmful site, likely for phishing or malware delivery.

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/wix?keyword=normes+sociales+d%25C3%25A9finition
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/bsc_chemistry_book_1st_year.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/parasitologia_humana_neves_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mijafovaginidobu.pdf
    • https://static.usrfiles.com/ugd/b8c837_79c122cbb9e543bfa8fee33298bd20e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_f4f5f3787226410ea63105508b12721c.pdf
    • https://static.usrfiles.com/ugd/f459ea_4ce7bd2107d84cfabbec5ecf9a3564cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_4133d9c88ac0455da2f278a27679651d.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41267837863.pdf
    • https://cdn.shopify.com/s/files/1/0432/3940/7784/files/pirelo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/28345476981.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_3184db4243464b1ea858202ae526e948.pdf
    • https://static.usrfiles.com/ugd/921909_4735b9b878644799bd767707de7fae63.pdf
    • https://static.usrfiles.com/ugd/906e9f_225d5f03f79c4bbb8dab9df79390ef2e.pdf
    • https://static.usrfiles.com/ugd/b11f6d_54e1c128f18649bf99491b59679a190c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006273.bin
7feb1ac8173a28cf978ed8ec825dda6f4757142d5531ecab664572ea81327a66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6273 5064 bytes
font_01_sfnt_off00007347.bin
1c22c71a214e6c648a2aeec8f117a3be7b4c439e1ebe3b9f22707c7341f50a85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7347 11480 bytes
font_02_sfnt_off00009813.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9813 4324 bytes

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