Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d262c61122ed81…

MALICIOUS

PDF

44.5 KB Created: 2020-07-29 06:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e11c8e3141cf55bc767eb69bb357901 SHA-1: 38f0ebed31d098747bc524be9e068236915ad89e SHA-256: 03d262c61122ed81c03b8ac9a6aece5851de8f4160bd86e24cffe5c0504a56c6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. The primary redirector URL, ttraff.cc, is flagged as malicious. This suggests the document is designed to lure users to malicious websites, likely for further exploitation or phishing. No scripts were extracted, and the document body is heavily obfuscated.

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=multiplying+mixed+fractions+with+unlike+denominators+worksheets
    • http://files.moring-sandojo.com/uploads/1/3/0/7/130776487/bikeju_jitufolenag_totumom_judiw.pdf
    • http://files.mytravel.guide/uploads/1/3/1/8/131856991/dinexalabaro.pdf
    • http://files.strongevan.com/uploads/1/3/0/9/130969507/d6904a3cd4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6294/2101/files/60257110338.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/mixefodizinakibu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7895/0810/files/36908513932.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6473/files/90851367394.pdf
    • https://cdn.shopify.com/s/files/1/0429/3653/3151/files/bupopuzunodijevobebimopix.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/sumupafigowulexerivije.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1336/files/60579268999.pdf
    • https://cdn.shopify.com/s/files/1/0434/2490/7414/files/mojizokelajipobo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kexuxedixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/51336292313.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/75757127876.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mefawubizujoki.pdf
    • https://cdn.shopify.com/s/files/1/0437/3997/1736/files/2467021110.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_off00006e09.bin
625946da24d05478bde293a59d6ee2cdd6d4bc2f6c59fe4f3ec225cfac1fae88
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E09 5784 bytes
font_01_sfnt_off000081aa.bin
58fcc64748676922a38c94f4ed3e5019d48be93585d84c200221bebaf61fb97d
pdf-font-stream PDF embedded font (sfnt) at offset 0x81AA 10112 bytes