Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e662cf18d4e6f24…

MALICIOUS

PDF

88.5 KB Created: 2020-09-08 14:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e97823c53726d3df2c7e83f2f4f82d72 SHA-1: 3a6f8c303fe8aa641695e5e923b21b8912fca666 SHA-256: 8e662cf18d4e6f242bee6a815ed53d7155cb83e4ecbf339313da89db7a4ba5f4
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Neoliberalismo en mexico presidentes pdf', suggesting a phishing attempt. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely used to funnel victims to a malicious site.

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.link/pify?keyword=neoliberalismo+en+mexico+presidentes+pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/p_c_s_of_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/gupasizazarirudox.pdf
    • https://cdn.shopify.com/s/files/1/0457/7401/2582/files/doge_template_roblox.pdf
    • https://cdn.shopify.com/s/files/1/0463/2503/9266/files/81236192118.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/fortex_cladding_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/canon_powershot_s2_is.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/billy_blanks_wife.pdf
    • https://cdn.shopify.com/s/files/1/0435/5869/9159/files/jizamis.pdf
    • https://cdn.shopify.com/s/files/1/0433/8846/9398/files/tatebuvideganonodidofat.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a6e6c3af0e04fbc8a3a456fb6f199ea.pdf
    • https://static.usrfiles.com/ugd/39a0fd_fe6a858737664b8e9eb0a8fc1f7fc1bc.pdf
    • https://static.usrfiles.com/ugd/e6092c_fcde88193a0449aa84e2b3847fad1116.pdf
    • https://static.usrfiles.com/ugd/c8df25_c1468621b42244cb92accfb295d07b83.pdf
    • https://static.usrfiles.com/ugd/10e3af_7b6e4ff82f85409b99bbfdf60e6f0d5d.pdf
    • https://static.usrfiles.com/ugd/8e7730_1193ebd6a964460d90a3f6becda21ee9.pdf
    • https://static.usrfiles.com/ugd/7dfe85_0dc65662dd504ecca127e238bb6c60eb.pdf
    • https://static.usrfiles.com/ugd/430cb2_823f50d201ac493bba33293972e797dc.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_off0001181d.bin
40db3ffee9b4d305d88653441ca1592ada86adad1b07de342dc4d78edc3f4004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1181D 5476 bytes
font_01_sfnt_off00012aab.bin
a97cb7aa2b1cea89ae818e6942acdea1ce04af876186bd147525e10e4310eaca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AAB 12668 bytes

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