Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bddb773cd551ac0…

MALICIOUS

PDF

36.8 KB Created: 2020-08-18 12:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5d13c3a6cdf9410a874426aca2921c9 SHA-1: 23f8b66292b6ccd086208597ca2302f76e3d14a5 SHA-256: 2bddb773cd551ac01d4e4cee5d26f920bb483a942aca85f750ae6699f3470432
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'candy crush game cheats for android' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly indicated maliciousness, and the PDF structure itself points to a link farm designed for SEO manipulation to distribute 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=candy+crush+game+cheats+for+android
    • http://felegevap.ejhayesorchestra.org/uploads/1/3/0/8/130873851/1566219.pdf
    • http://files.thelawnandgardengeek.com/uploads/1/3/1/3/131381976/2726fe7.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/sebozu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8329/2060/files/2834096436.pdf
    • https://cdn.shopify.com/s/files/1/0432/5507/0880/files/saitek_x55_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/voponaripipana.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/tumapober.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/hamilton_flute_sheet_music_easy.pdf
    • https://cdn.shopify.com/s/files/1/0431/7184/0161/files/big_ideas_math_book_8th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0435/5856/8097/files/83828294351.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_off00004e16.bin
6840df3913e80a6967965bcf0e5f6edf48b38f9e8e57d73104473642bce92aee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E16 5408 bytes
font_01_sfnt_off00006053.bin
43be5f4acaffb2b9602526df1777abce717aef220a24ca5484720ec9215c6e52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6053 11920 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.