Malicious PDF — malware analysis report

Static analysis result for SHA-256 684685606a49c595…

MALICIOUS

PDF

44.1 KB Created: 2020-08-24 10:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1adb67343551d3110e7718c7824347e8 SHA-1: a811bb73380b4dd99f4ec11b6ae650c1204b0a4d SHA-256: 684685606a49c595e347b6bbc787ff757487c793d504d5dc67edc9407269ad14
154 Risk Score

Malware Insights

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

The PDF contains a lure related to reading capacitor values, but it embeds numerous links to external PDFs, including a malicious redirector. The primary malicious link is https://ttraff.com/pify?keyword=how+to+read+capacitor+value+pdf, which likely leads to further malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of a phishing or redirection attack.

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.com/pify?keyword=how+to+read+capacitor+value+pdf
    • http://files.activealuminium.com/uploads/1/3/0/9/130969889/7563218.pdf
    • http://gedix.toledopresbyterian.com/uploads/1/3/1/4/131409236/7573600.pdf
    • http://files.barkavedeland.com/uploads/1/3/0/7/130775084/vaxajijotuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/2432/6564/files/93016340524.pdf
    • https://cdn.shopify.com/s/files/1/0437/4095/4778/files/76089775053.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/cursive_capital_letters_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/6913/5262/files/epinephrine_hormone.pdf
    • https://cdn.shopify.com/s/files/1/0436/0355/8564/files/ratchet_rake_amazon.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/qualitative_data_analysis_with_nvivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/20732211825.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/85246182962.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_off000063d0.bin
913e8a1f66d73aeb7cb2247c6ceac98826e7068500474855e83037b7bec2a8e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x63D0 4860 bytes
font_01_sfnt_off00007484.bin
e3609f977c15710e033e2bc69c55b0fd411010a3d005f0b00b8c00b1ab028606
pdf-font-stream PDF embedded font (sfnt) at offset 0x7484 9768 bytes
font_02_sfnt_off000095ed.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x95ED 4324 bytes