Malicious PDF — malware analysis report

Static analysis result for SHA-256 543b49c2cc7347ed…

MALICIOUS

PDF

65.0 KB Created: 2020-08-29 08:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f68628ed36b8de7874174bbe9facb4b SHA-1: 5ca49382be65c9b51a92a9c25512016d9b8e91b4 SHA-256: 543b49c2cc7347eddefc4b670752f330cfc2115e1550d1058c82fef14df6e416
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the visible lure text "Trucos yu gi oh forbidden memories" and the malicious URL. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a larger link farm, suggesting a broad distribution effort. No scripts were extracted from this sample.

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.me/wix?keyword=trucos+yu+gi+oh+forbidden+memories
    • https://static.usrfiles.com/ugd/b8c837_ccfb64e812744ad59232504a28e0ace2.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8842bec2de24456a8403725306eee8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_15d987383e264efbaaf12855d5cf5ee2.pdf
    • https://static.usrfiles.com/ugd/b8c837_0382f1784b574ed6aa54fec793b727b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_55c95d7425094209b1bd0b0057209363.pdf
    • https://static.usrfiles.com/ugd/b8c837_c93680be0c0b429e94243db76bad95db.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/xikirokexawu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3406/6600/files/ac_dc_are_you_ready.pdf
    • https://cdn.shopify.com/s/files/1/0450/9207/7731/files/17745194334.pdf
    • https://cdn.shopify.com/s/files/1/0433/6962/7799/files/tipos_de_sustantivos_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0433/9620/2661/files/64861827760.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/1935332825.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/scarlet_letter_cliff_notes.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/jaretadarebizub.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/95362203446.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_off0000a4dd.bin
cb13664e0568b53c2124460cc2cde1e9d5b772b6054e1ddac1bf5654fb596d81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4DD 5188 bytes
font_01_sfnt_off0000b648.bin
50ef8fe50086a02411bdc58bd5b3cea7818feaad4f7f92dfc89fda44b62c1154		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB648 15864 bytes
font_02_sfnt_off0000e72d.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE72D 4324 bytes

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