Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ef2afe8876981f…

MALICIOUS

PDF

55.1 KB Created: 2020-08-29 02:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2debf19c56b01c125f488ba6f959bfad SHA-1: b556ca99027dcd2038e741957653036a9ac8a050 SHA-256: e1ef2afe8876981f3a4edd0543dfc03a3a0c777663061c9da3500a75406927cc
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a high number of embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=amd+ryzen+news'. This suggests the document is designed to lure users to malicious sites, potentially for phishing or malware delivery.

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/wix?keyword=amd+ryzen+news
    • https://cdn.shopify.com/s/files/1/0435/3982/4799/files/sourcework_academic_writing_from_sources_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0459/1733/9797/files/gate_2020_application_form_for_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/84916245036.pdf
    • https://cdn.shopify.com/s/files/1/0438/4276/4962/files/compare_and_contrast_worksheets_for_second_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/59965556128.pdf
    • https://static.usrfiles.com/ugd/b8c837_23799f3ba6c243ea8baf3643a0d8dad7.pdf
    • https://static.usrfiles.com/ugd/b8c837_5876e8aa94a6436a82a12641b0ecc9a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf891badc31849da8cd8b63f8aa99142.pdf
    • https://static.usrfiles.com/ugd/b8c837_c692caf4a0a64d8ca1ba09c60602eacc.pdf
    • https://static.usrfiles.com/ugd/b8c837_25093086ecdc46799c85d4f7d396e16b.pdf
    • https://cdn.shopify.com/s/files/1/0448/2197/1104/files/arlberg_ski_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000b649.bin
83a3516c575b60b736ed85228108a561f7077655e2fe7d5064016461bbdfb161
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB649 17384 bytes
font_00_sfnt_off0000819f.bin
51478ba0b21df6a3bad87ca580c6597b059926edaf77d98272122dfdd9d34b8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x819F 4960 bytes
font_01_sfnt_off0000928a.bin
2748c105cc8500982b8b84a480523cc65e90ef7c161c3d8761aa96f4ba187b66
pdf-font-stream PDF embedded font (sfnt) at offset 0x928A 10380 bytes