Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f41ce045567b9b3…

MALICIOUS

PDF

47.0 KB Created: 2020-08-20 07:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2d5ca691ed909fe62e3820c324ba7e8 SHA-1: ed9725740c289e569e77b379f82e45c3c7730393 SHA-256: 2f41ce045567b9b347f29ef613c98cbab88de2beb42a61646ce8fbf23b86bb60
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=news+report+intro+generator', is designed to lead users to malicious infrastructure. The document also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=news+report+intro+generator
    • http://kujotu.selectbuildersinc.com/uploads/1/3/2/7/132740478/tiwur-bapamuw-lubevabow.pdf
    • http://files.signaturedjs.net/uploads/1/3/2/7/132710563/7462703.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6908/files/ardhanariswara_stotram_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1424/0931/files/free_weight_loss_eating_plan.pdf
    • https://cdn.shopify.com/s/files/1/0432/4648/5672/files/22397298740.pdf
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/2569034418.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53940500656.pdf
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/tamilnadu_employment_news_paper.pdf
    • https://cdn.shopify.com/s/files/1/0431/6204/2529/files/avid_one_pager_rubric.pdf
    • https://cdn.shopify.com/s/files/1/0431/9176/3105/files/introduction_letter_of_a_company_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/4732/9702/files/lanaza.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/97915601183.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7256/files/jewimuwirojozefed.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/
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/tamilnadu_employment_news_p

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b03.bin
9639b1dfd067c970c9134a257cad9e169db0a86a0ea8acd56884317475681ebc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B03 5016 bytes
font_01_sfnt_off00008c3c.bin
600dc52fba7c308502df521153557bafcf70b721a4d3c3d53f53fd06c9632ba2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3C 10288 bytes