Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e1994394903176…

MALICIOUS

PDF

49.1 KB Created: 2020-08-25 05:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad1e3db14da4deea8d873a6563a2ad6b SHA-1: a3dc9b7e3a94bd8ca6ec8a8273003487f1dd17a5 SHA-256: 60e1994394903176701e22cb8cad323c38654484358558942c935d7751f809db
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=affairscloud+pdf+october+2018', is identified as a malicious redirector. The document also features a mass external PDF link farm, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to lead users to harmful sites.

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=affairscloud+pdf+october+2018
    • http://files.countryminds.com/uploads/1/3/1/1/131163960/tubekosadafufamitofo.pdf
    • http://files.grassriver.org/uploads/1/3/1/8/131856827/ripefutavaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0454/6487/9256/files/48385130749.pdf
    • https://cdn.shopify.com/s/files/1/0447/8841/6669/files/c_foreach_loop.pdf
    • https://cdn.shopify.com/s/files/1/0429/2388/4711/files/yaseen_shareef_roman_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/2200/0029/files/32967666591.pdf
    • https://cdn.shopify.com/s/files/1/0433/6392/6174/files/fortnite_aimbot_xbox_1.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/variance_analysis_actual_vs_budget_with_explanation.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9163/files/no_witchcraft_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9783/files/performance_evaluation_report_sample_format.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_off000080fc.bin
99bcaf953977bd807c8b0f56f6ed87bbad57e42663dafcb205394ee124c6d540
pdf-font-stream PDF embedded font (sfnt) at offset 0x80FC 5796 bytes
font_01_sfnt_off000094be.bin
380e1cf03029d2da3ade6ccdd90f37222d37bc97f13abcbe3858cde89f4760c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x94BE 10280 bytes