Malicious PDF — malware analysis report

Static analysis result for SHA-256 146adc05dbae2e34…

MALICIOUS

PDF

42.2 KB Created: 2020-09-03 14:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cab2f5a6b518dce85cd1ecf98012fdb6 SHA-1: 0f4c63e9fddfd298b745d3220a23030c75a0443e SHA-256: 146adc05dbae2e34d88c51840d525c5ce0287117e3ff6f579754fd995e260bf3
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.ru. This indicates an attempt to redirect users to malicious infrastructure. The PDF_SEO_LINK_FARM heuristic further suggests a large number of links were embedded, likely to manipulate search engine results or to host phishing content. While no scripts were extracted, the embedded URLs and heuristics strongly suggest a malicious intent to redirect users.

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=clear+cache+di+android+oreo In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0652/4581/files/fijoxeragafaxiralalude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/gevarugoliseg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/big_data_basic_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7320/0537/files/installing_act_ffxiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0367/4785/files/7652955121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/lowekusapakupepavotuxobuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5046/6464/files/36676297870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5430/9274/files/96756366056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/53124786933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/kerala_christian_wedding_invitation_card_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9126/4415/files/1.14_optifine_xray.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9125/5713/files/65605753202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4128/4518/files/bosavoxuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/2158/5831/files/klasifikasi_tanaman_asoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/mikulolu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bcd.bin
a0ccf9fd215792ce2538d7e661cf4880b1c5ab2585866d85b7e174731d8d2ab9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCD 4580 bytes
font_01_sfnt_off00006b3e.bin
a56859abe2910bda39792d192a8fbb8d89ac93731fa3b182d74229e370a22c78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3E 10456 bytes
font_02_sfnt_off00008df0.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF0 4324 bytes

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