Malicious PDF — malware analysis report

Static analysis result for SHA-256 141c3e27169a563b…

MALICIOUS

PDF

54.1 KB Created: 2020-08-17 01:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26c435543dd59a2a20b0418192417964 SHA-1: 1eea998e0d7188670abfb291794f987a8d438761 SHA-256: 141c3e27169a563bb99e7e8292823875bd097ea0f76217f8e5db7396e5800152
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm strategy, likely to manipulate search engine results or host malicious content. The presence of a malicious redirector and a large number of external links strongly suggests an attempt 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=apsrtc+live+track+apk+pure
    • http://files.tirepeaterclub.com/uploads/1/3/1/4/131483344/2959976.pdf
    • http://files.prestigeservicesleeds.co.uk/uploads/1/3/2/7/132712358/5599d60654e.pdf
    • http://files.alissaellisphd.com/uploads/1/3/1/4/131452827/844207.pdf
    • http://xeravinov.midtrans.online/uploads/1/3/0/9/130969300/bee06.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/55864873889.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/buliwavakabitu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8958/2487/files/edit_current_website_bookmarklet.pdf
    • https://cdn.shopify.com/s/files/1/0438/3476/9568/files/qualities_of_a_good_lawyer.pdf
    • https://cdn.shopify.com/s/files/1/0449/9632/9636/files/presentation_on_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/62900136954.pdf
    • https://cdn.shopify.com/s/files/1/0440/8301/9941/files/archeologia_e_calcolatori.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/compendium_of_the_catechism_of_the_catholic_church_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4340/files/akbarnama_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/degunezatodudebivuzulinis.pdf
    • https://cdn.shopify.com/s/files/1/0437/2401/3722/files/baixar_creator_1._2_1.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000572e.bin
4a8599ce7c93ee72b04ca8c2714af00efc3aa3274038c670036aa769a047032f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x572E 5040 bytes
font_01_sfnt_off00006868.bin
78249253cd712fc94dff035a7d2373e586bda85494f775a87934acbbb69c6781		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6868 26876 bytes
font_02_sfnt_off0000a271.bin
59dd919489a2ff48848094529883be2cee9961c16cbb4bf6afeae9290a8a4653		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA271 12780 bytes

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