Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf30f2874597c7f…

MALICIOUS

PDF

44.7 KB Created: 2020-08-29 15:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c265bbf5165f52086285b039688fb55 SHA-1: 32ed9ddb828f11447f64fd3e8b500c717dd4285a SHA-256: 7cf30f2874597c7f752f809504df0e87f18b0902635943312bf610f1be120fb0
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other platforms, forming a link farm. One prominent URL, https://ttraff.cc/wix?keyword=finding+missing+angles+worksheet, is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious lure.

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=finding+missing+angles+worksheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/pawewazanezenisoxatevoxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/wamijakizejujufiriboz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9807/9399/files/2350482375.pdf
    • https://static.usrfiles.com/ugd/b8c837_1da48d54109c46d7999633c552ef3fab.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9a476d06f4149d8891dea33996ddab3.pdf
    • https://static.usrfiles.com/ugd/b8c837_a927fb0957c1426aac563ceaf608d715.pdf
    • https://static.usrfiles.com/ugd/b8c837_597443141cdd4dd08befe21a0b7ad014.pdf
    • https://static.usrfiles.com/ugd/b8c837_75560a67bc894a448044a18ddd58077f.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/modaporubewibodoxura.pdf
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/vagakivexaseribilusug.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2731/files/26457414206.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/maraxap.pdf
    • https://static.usrfiles.com/ugd/b8c837_56832bff5e0b4c5982dfa82bff44cd28.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e6a3929249e468a8f60bc57758d863e.pdf
    • https://static.usrfiles.com/ugd/6d59ab_06d449f4e03243479c875308935985d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_7bc2e472518c4cb5971b155f53cfe5c8.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_off00007015.bin
81bb401b798444a8061ef7bbaabdc1caf62425e4e888c281b2f4e7e599269cb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7015 5352 bytes
font_01_sfnt_off00008229.bin
7717f019afb317288cdcf6c9918a53fd7e041c245b0a5a344be5220866d8cac1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8229 10428 bytes

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