Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c712fb9882a9016…

MALICIOUS

PDF

36.5 KB Created: 2020-08-24 20:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 822378e2b3fef124531be99886f4b286 SHA-1: 38f16a816f93681b4421c87dca1866ff3c989824 SHA-256: 0c712fb9882a9016f0c7418219aa456a871e8aa64b2e4556224f7908071cde1d
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. One of the primary links, however, leads to a malicious redirector at `https://ttraff.ru/pify?keyword=padmavati+background+music++pagalworld`. This suggests the document is part of a link farm or SEO manipulation scheme designed to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

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/pify?keyword=padmavati+background+music++pagalworld
    • http://files.alphaomegaassociates.com/uploads/1/3/1/0/131069869/75164a56.pdf
    • http://mafinuvu.maryvillegov.com/uploads/1/3/0/9/130969352/setowadidabova.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/76662862291.pdf
    • https://cdn.shopify.com/s/files/1/0431/3359/9893/files/gmat_preparation_books.pdf
    • https://cdn.shopify.com/s/files/1/0437/4652/5338/files/marekita.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/lobafapesopurufakofurigo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/wogadanezadopipedu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6375/files/11198519933.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/90580178190.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/10283878908.pdf
    • https://cdn.shopify.com/s/files/1/0443/1645/9164/files/all_the_best_fun_begins_2009.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/budgeting_in_the_public_sector.pdf
    • https://cdn.shopify.com/s/files/1/0430/9578/5621/files/bangla_adarshalipi_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/97336424352.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/gowetimukomejeda.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_off000046f7.bin
644afa867b1a4bf1919b55e3d704c0a5179aa540f021987b1cbe3f82008ce842
pdf-font-stream PDF embedded font (sfnt) at offset 0x46F7 5748 bytes
font_01_sfnt_off00005a84.bin
b9d1dd45dad1be107c9dfe0ed667ddf481f7bb12d4a9fd7a82d75a8b6209c858
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A84 12616 bytes