Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0954224c55fa8fc…

MALICIOUS

PDF

58.1 KB Created: 2020-08-12 08:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f75b3d7d5bbade8682e9091eea30c029 SHA-1: 1f5328fe6765f1d978376376833bfd3fb7ffe2a2 SHA-256: c0954224c55fa8fcb5618f26bf526032ac28299cdd20c6253c37c0902d671753
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a PDF download related to 'Anlodipino 5mg'. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

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.ru/pify?keyword=anlodipino+5mg+bula+pdf
    • http://files.susankain.com/uploads/1/3/2/6/132683087/7202268.pdf
    • http://nudub.katelinparkinsonnd.com/uploads/1/3/2/7/132741099/dowup-toreg-salilalekodita.pdf
    • http://files.nlg-pros.com/uploads/1/3/0/9/130969910/katixiratowapo.pdf
    • https://cdn.shopify.com/s/files/1/0445/7683/3700/files/ralirabasibekabutopemajik.pdf
    • https://cdn.shopify.com/s/files/1/0434/7743/4525/files/25633920587.pdf
    • https://cdn.shopify.com/s/files/1/0447/4611/3173/files/ahmad_faraz_poetry_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/novovodunugek.pdf
    • https://cdn.shopify.com/s/files/1/0435/3196/0474/files/kojodida.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/65017581662.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/vutonuwurexarulaxegabi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1156/files/anatomy_of_human_female_reproductive_system.pdf
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/87083665565.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/senaxowuxam.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/best_astrology_books_for_beginners.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009c0a.bin
c47ae95dcd9ae7c070268252e06343d8622bb71e2aa1130a145a8d01d5ccbfac
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C0A 5340 bytes
font_01_sfnt_off0000ae2a.bin
952822b1b1ca168f8cf942937a1859ea57b4cf66ea305a0d55cd89819c7904de
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE2A 14580 bytes