Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e1b8697731fe7f…

MALICIOUS

PDF

39.0 KB Created: 2020-08-29 01:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0811894a9d3e68f6975d853b3314f5d1 SHA-1: 405bb6ed68a1f53a41b9b0a06010e9aed63e591d SHA-256: 16e1b8697731fe7f402124f87769da81ebfa8119bc1e61047a9e331ee68030b0
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Zoom contact lenses' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The presence of numerous links and the malicious redirector indicate a link farm or SEO poisoning attack.

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.ru/wix?keyword=zoom+contact+lenses
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/pofesinofizaparafonava.pdf
    • https://cdn.shopify.com/s/files/1/0441/3915/1512/files/bootstrap_template_profile_page.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9603/files/lifemopo.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab81987757864880b9211f26daa779da.pdf
    • https://static.usrfiles.com/ugd/b8c837_f53d49b08e8b4ac1ba547611e69cacbb.pdf
    • https://static.usrfiles.com/ugd/b8c837_05428dbbc6964fa4a8105a5196c7ac02.pdf
    • https://static.usrfiles.com/ugd/b8c837_649fc76ab302416196cc732d72362e6c.pdf
    • https://cdn.shopify.com/s/files/1/0429/5242/5631/files/mathematics_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/93710281645.pdf
    • https://cdn.shopify.com/s/files/1/0429/5992/9503/files/zosexeruwumugaga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdf
    • https://cdn.shopify.com/s/files/1/0435/9172/9309/files/amorphous_solid_dispersions_theory_and_practice.pdf
    • https://cdn.shopify.com/s/files/1/0432/4871/3896/files/xafaxibebes.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/gedamamu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/importance_of_educational_administration_and_management.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_off00005de6.bin
7c971551ea30ce88bf642bb93c9703a1f3027ad0e75ba7f3ef22e7b4f136f477		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE6 4804 bytes
font_01_sfnt_off00006e27.bin
5894a2631204cc92ef4917372edd9893d5a863c2ae2083bb85ec27d92c76ba93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E27 9760 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.