Malicious PDF — malware analysis report

Static analysis result for SHA-256 013925d45a6bc972…

MALICIOUS

PDF

41.2 KB Created: 2020-08-19 03:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca8e47a8c01e317fc6cd6bf60c55a195 SHA-1: 3b86110bb5b803993f30dc1a86749c532298039f SHA-256: 013925d45a6bc9727f84856d461f9c0e34b06a0f524cb32f4f8101e9cf43fe8c
154 Risk Score

Malware Insights

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

The PDF document contains a malicious redirector link, identified as 'https://ttraff.cc/pify?keyword=uc+browser+android+software', which is designed to lead users to further malicious content. The document also hosts a large number of links to other PDFs, likely for SEO manipulation or to spread the malicious payload across multiple domains. The ML classifier strongly indicated maliciousness.

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=uc+browser+android+software
    • http://files.michaelbigelowdixon.com/uploads/1/3/1/0/131070651/f479b1ab2fe6.pdf
    • http://watuxu.louthanlab.com/uploads/1/3/0/8/130813765/e6397f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9436/8663/files/movizubedipilun.pdf
    • https://cdn.shopify.com/s/files/1/0432/5815/1072/files/digital_electronics_william_gothmann_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/28397456005.pdf
    • https://cdn.shopify.com/s/files/1/0440/5002/2550/files/cindy_trimm_warfare_prayer.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/9695702500.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/50335641884.pdf
    • https://cdn.shopify.com/s/files/1/0434/7366/6213/files/7945904408.pdf
    • https://cdn.shopify.com/s/files/1/0447/5728/7061/files/66279370194.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/circle_of_fifths_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/dofulujafepilat.pdf
    • https://cdn.shopify.com/s/files/1/0432/5018/8443/files/98849406116.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_off000063d3.bin
8b1ae2621b06213167070ae8572d06d02fa796cd0b5d0f2100d6cd2834a17b62
pdf-font-stream PDF embedded font (sfnt) at offset 0x63D3 5208 bytes
font_01_sfnt_off0000759b.bin
efe6b102c1a6cb3574907ede1da22c9be6e064c4c6f2f623013532d4efbe3538
pdf-font-stream PDF embedded font (sfnt) at offset 0x759B 10252 bytes