Malicious PDF — malware analysis report

Static analysis result for SHA-256 693dfbd4193656be…

MALICIOUS

PDF

42.5 KB Created: 2020-08-31 12:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f280e64d2011ffc05506b8b228507946 SHA-1: 569ef47ef0c144bdb65fdbd8541f28acf7803793 SHA-256: 693dfbd4193656bef5c3c37989f43243c4085e37373a81823c88df3c9c8d821c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are part of a link farm, with one primary URL leading to a redirector. This suggests the document's primary purpose is to direct users to malicious sites, likely for phishing or malware delivery.

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/wix?keyword=formato+dc-+5+editable+2018+word
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1431/4405/files/14913524005.pdf
    • https://cdn.shopify.com/s/files/1/0433/3817/0523/files/windows_7_enterprise_64_bit_product_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7056/files/2639331736.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6160/files/pomopodarowumu.pdf
    • https://cdn.shopify.com/s/files/1/0439/3975/8235/files/guia_autometrica_abril_2020.pdf
    • https://static.usrfiles.com/ugd/2b25b5_81c6ae428dcc41588aa5213ee8310f6d.pdf
    • https://static.usrfiles.com/ugd/1f2646_2026d6d737ec4c9390c2f1f383dc948b.pdf
    • https://static.usrfiles.com/ugd/a18aa6_d33ba2f7839746298091b2a0b0cdbd27.pdf
    • https://static.usrfiles.com/ugd/5e81b9_e385b33d5cb549a690084cf3578a3402.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/42781626735.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7972/files/xaxupu.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_off00006587.bin
6f49ca3bf5a636dbc46642b50b84d515e6ba09c19f60095718d5f91398bb0afe
pdf-font-stream PDF embedded font (sfnt) at offset 0x6587 5772 bytes
font_01_sfnt_off00007936.bin
8c449628c794abd44b1253eb57e26ad7489f0afcd1b330794b1920388a240a51
pdf-font-stream PDF embedded font (sfnt) at offset 0x7936 11160 bytes