Malicious PDF — malware analysis report

Static analysis result for SHA-256 2677ad4854e2981c…

MALICIOUS

PDF

76.7 KB Created: 2020-08-09 11:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce7d370eb10ad62e2bd4904257cfa56c SHA-1: 17ae64234f54a4161d3d5515fd768cb242ba0377 SHA-256: 2677ad4854e2981cea35eb295af856b2afcc491fc53cb54e598178b22b10f2a8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=type+of+cybercrime+pdf'. Another heuristic indicates a link farm with numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=type+of+cybercrime+pdf
    • http://mofirib.thatwallpaperstore.com/uploads/1/3/0/9/130969744/dixugugajig.pdf
    • http://files.actao.ca/uploads/1/3/1/3/131380612/16e18cd0977fe.pdf
    • http://files.jennifercrallpsychology.com/uploads/1/3/0/8/130874403/4517183.pdf
    • https://cdn.shopify.com/s/files/1/0432/0804/8808/files/nouns_in_english_grammar_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/3407/3505/files/gomezinodo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/vewisiwesewagavir.pdf
    • https://cdn.shopify.com/s/files/1/0438/0858/7933/files/roxisupizajep.pdf
    • https://cdn.shopify.com/s/files/1/0431/2947/1130/files/69683095418.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/78474471774.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2629/files/cutting_tool_materials_and_cutting_fluids.pdf
    • https://cdn.shopify.com/s/files/1/0438/3332/7776/files/vibowepifofavobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/antigen_structure_and_function.pdf
    • https://cdn.shopify.com/s/files/1/0435/3956/2651/files/67444756878.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/gestion_de_la_cadena_de_suministros_chopra.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efcf.bin
abc3c985a6d4a51484d3d72a817d11f3d5439e390a06a3d6af80132bb0ea8681
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCF 5072 bytes
font_01_sfnt_off00010104.bin
9ead1346118570f67e14c008302324a93f2b00c24692e97b32542112cd85891b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10104 10852 bytes