Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba61dcde918accc3…

MALICIOUS

PDF

45.1 KB Created: 2020-08-21 21:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e45c91d3a2c005a7e0efa2a719c38a8b SHA-1: 14361eab8cdac44643d4ff861c655e5b083508e0 SHA-256: ba61dcde918accc3aa72df2fd6cfd2de668a307f52e88c7a0fb70c7534e03a92
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a prominent link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure related to a game bug report, likely intended to trick users into clicking the malicious link. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further indicates malicious intent.

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=report+bug+league+of+legends+br
    • http://files.sunsetchoralarts.org/uploads/1/3/1/1/131164452/kogatabizavevewakan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pepefawabibuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6846/files/relexas.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7755/files/world_mythology_donna_rosenberg_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/podoporerivev.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/aikido_my_spiritual_journey.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdf
    • https://cdn.shopify.com/s/files/1/0435/4319/9898/files/bonud.pdf
    • https://cdn.shopify.com/s/files/1/0429/2709/5967/files/solving_radical_equations_and_inequalities_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/54112631557.pdf
    • https://cdn.shopify.com/s/files/1/0440/1355/1781/files/17409852189.pdf
    • https://cdn.shopify.com/s/files/1/0435/0764/6630/files/2000_ford_ranger_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/bsava_manual_of_small_animal_anesthesia_and_analgesia.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006386.bin
71f7511919b8afe951563d730753a98e038f9440a22a5449e2e60eedb0264b97
pdf-font-stream PDF embedded font (sfnt) at offset 0x6386 5356 bytes
font_01_sfnt_off000075c1.bin
b54b07522fdf07cb5faa80bbd00a6a1c31a0d31a7b2a312b1d3680efba207fb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x75C1 2968 bytes
font_02_sfnt_off0000824f.bin
a8d05501bb644c00766eec29aaf7d5b96cac5f1c7ff31038184a583a2eebf673
pdf-font-stream PDF embedded font (sfnt) at offset 0x824F 10852 bytes