Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb3b44ca82358db…

MALICIOUS

PDF

45.0 KB Created: 2020-09-06 14:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3677a90762157ce5eb1bb7a7663e4133 SHA-1: 77314fce7f1da20890ff403dce3a52409c8524ad SHA-256: 4eb3b44ca82358db791af2360e0faa05dce7277d9d3ddf7dd44441212106d7cc
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, pointing to various PDF files hosted on Shopify and other domains. One of these links, https://ttraff.link/pify?keyword=barren+island+volcano+information, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links, suggesting an attempt to manipulate search engine results or direct users to malicious content. The ML classifier also strongly indicated maliciousness.

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.link/pify?keyword=barren+island+volcano+information In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6119/8500/files/libibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/63943655448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4312/5405/files/folegagajiteduv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82127534182.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2959945006774553958c5b15a32d6e16.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/739437_0bac60a508304d91b694089e7f483715.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/08fe48_1c70012fb0ae43c2981bd2d4e84a6efc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4dd980_6c5f21d00aff43c08d1f8fabc7bce3fb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0bcf16_deb5ca377b4d4b1188d29f90f9e1d470.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_62efa845e940446e88105a7eda97732d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2ca22b_2dbe347fa36b49e3b68e26d5c723945c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d43733_0ca51839f23348da9687f8a66aeaa271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/46681616962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3778/4229/files/leroparalavopefow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0183/9522/files/upton_sinclair_the_jungle_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7581/9927/files/13119319943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/kuvudojulototavajofa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000727a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727A 5276 bytes
SHA-256: cd5b55f247475c3edf6c178821abddd4537fb3c34558266496360205ae4d06b8
font_01_sfnt_off0000845e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x845E 10152 bytes
SHA-256: c7661bbdf8f73be457e2a8ede4ccd4842491f883aead07fe5306c61422965b9b

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