Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c30b15aa9fc3271…

MALICIOUS

PDF

42.6 KB Created: 2020-08-29 21:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ae4a4d85ce323da202cd16556425a8a SHA-1: e45f01b9874db3b56e4e5f011bea62f5d6835440 SHA-256: 5c30b15aa9fc327122ba39699da8838044decba41280b1a407b02deb839726e5
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URL https://ttraff.cc/wix?keyword=comparar+e+contrastar+ideias+for+bab is a primary indicator of this malicious activity. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to potentially harmful content, likely as part of a phishing or scam campaign.

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=comparar+e+contrastar+ideias+for+bab
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1833/6925/files/avian_influenza_in_poultry.pdf
    • https://cdn.shopify.com/s/files/1/0439/2484/8795/files/waxal.pdf
    • https://cdn.shopify.com/s/files/1/0434/0865/4492/files/kumuwaza.pdf
    • https://cdn.shopify.com/s/files/1/0430/5269/5703/files/jovobexixuwurimu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/repedajuxaxaloragofe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7330/5762/files/alif_lam_mim_para.pdf
    • https://static.usrfiles.com/ugd/bb13a2_660f1077364e4034969759f093ac214f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cf55a1e12b049beaef37598af8b68c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bb73b75561047939d52aa76e6e8a4b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_c600590d24314c688e96f21fb110b748.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f6107fba7ee425ba769464669ef6d58.pdf
    • https://static.usrfiles.com/ugd/38bf1f_0926712b103140758a88a4d67bb28f9f.pdf
    • https://static.usrfiles.com/ugd/cc03df_c189e5ffe7fc4046addd78d1b8427c0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f4427a72ee54ff1ae66f07e83c5cc71.pdf
    • https://static.usrfiles.com/ugd/eaf48f_9f3600f53e354749ae1736f7571cd180.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_off00006442.bin
caa1e1c8b9ace95946eb0b343a7dd3bd99b3e3ae2c1133851dba5d4a6bc7384e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6442 5316 bytes
font_01_sfnt_off0000762f.bin
0c2ab5e23686633ae90a2b5c5eb49962a0dfbdf8692665b13bc56f4518054703		 pdf-font-stream PDF embedded font (sfnt) at offset 0x762F 12408 bytes

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