Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce228a30b1ba6eaf…

MALICIOUS

PDF

140.9 KB Created: 2020-08-29 21:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1e21b0e948662c3a54f34ed59e57ed4 SHA-1: 804ff5ac9970788200f1ad79efed127c653c5b0f SHA-256: ce228a30b1ba6eaff01ed53f3a4c153f2fb61a0d18eb2061b56bc5abc7605065
152 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous links to PDF files hosted on cdn.shopify.com, likely intended to obscure a malicious redirector. The primary malicious URL, https://ttraff.cc/wix?keyword=qu%25C3%25A9++los+s%25C3%25ADmbolos+significan+en+un+s, is flagged as a known malicious redirector. The document body itself is heavily obfuscated and contains remnants of the redirector URL, suggesting a social engineering lure to trick users into clicking the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/wix?keyword=qu%25C3%25A9++los+s%25C3%25ADmbolos+significan+en+un+s
    • https://cdn.shopify.com/s/files/1/0449/9108/6750/files/aerodynamics_book_anderson.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8232/files/4943466848.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/wuvojavulemina.pdf
    • https://cdn.shopify.com/s/files/1/0429/7107/0617/files/83180156214.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/epoc_causas_sintomas_y_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/nha_study_guide_for_cbcs.pdf
    • https://cdn.shopify.com/s/files/1/0431/6571/2535/files/meaning_baseline_information.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/viwubesonixetazinatuku.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/bivufujuzomavig.pdf
    • https://cdn.shopify.com/s/files/1/0434/4689/4758/files/genetic_algorithm_free_download.pdf
    • https://static.usrfiles.com/ugd/5de1df_e531aaddfd8240b69a337b87469083df.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf749022ce3b4451b87ed439770c196e.pdf
    • https://static.usrfiles.com/ugd/a18aa6_d46cfbe4a48947c4adde1dacb03f0e67.pdf
    • https://static.usrfiles.com/ugd/b8c837_f166e2c1d215496f9fdefdc1a5be1c93.pdf
    • https://static.usrfiles.com/ugd/b8c837_039835a708814282a1dc5d2e04d0ec66.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a0c6.bin
04fd3da1957003210583fdf7060de9ade7121f82bf7c68e0a22be1976292d112		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0C6 5504 bytes
font_01_sfnt_off0001b324.bin
f434e63c2b134d3e33006aae718b2cfc7865ff02b2ce10a5bcce20c0782412d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B324 1768 bytes
font_02_sfnt_off0001bbef.bin
24e6d39217ccec28f2151a812e2b5f75f1a9823d8b4e25ed8731c87649aa9f72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBEF 19736 bytes
font_03_sfnt_off0001f8b0.bin
5606c5ef5234c2e063d62f920330ca6f44966f6ac2fb54599bd4773483e77099		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8B0 22968 bytes

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