Malicious PDF — malware analysis report

Static analysis result for SHA-256 822f3adf63920013…

MALICIOUS

PDF

46.4 KB Created: 2020-08-30 17:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95442957af0374948ed27232068626ab SHA-1: 3071834ea9c6ac001bdb8a4c1dc4ba965e67d6e3 SHA-256: 822f3adf6392001346bcbc0051f57ff5b3cbda5b378398e5cb3aac96c04120c7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate PDF resources. The primary link redirects to 'ttraff.com', which is flagged as a malicious redirector. This indicates a likely attempt to lead users to malicious content or phishing sites. The document body itself is largely unreadable binary data, but the presence of the malicious redirector and the link farm heuristic strongly suggest a 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.com/wix?keyword=ejercicios+lateralidad+cruzada+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/vomirijakufigos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0147/0366/files/pathways_2a_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/ftir_spectroscopy_principle.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/dell_u2412m_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/33274530632.pdf
    • https://static.usrfiles.com/ugd/e73fea_6cf12b16977f475fa8f31878fe530618.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e2bf76a4b564dcda30c20787716851e.pdf
    • https://static.usrfiles.com/ugd/b8c837_0eb0e77a0ce34d7fbf99dfe246adae0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_155ba0f02f494e728781041923348362.pdf
    • https://static.usrfiles.com/ugd/b8c837_6694744333924d179f20ebd4164a7612.pdf
    • https://static.usrfiles.com/ugd/9cc572_f175472295ed48d1b6601de3f6a65dbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb486d2540eb4375921f7e53f31edb78.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9cb64377931492a976cbb0dee8b1c33.pdf
    • https://static.usrfiles.com/ugd/b8c837_927c2bf494ff478d8ebdfe818e39c2e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_58492f66ab424fb8bc72b81a71a7c012.pdf
    • https://static.usrfiles.com/ugd/43d598_282e2a3129ca4fcaa8828f3c4abab87e.pdf
    • https://static.usrfiles.com/ugd/b8c837_16ebe99b704746ec9d98455de98a22e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_c56c23667a3c4f32b15b664030b16ee7.pdf
    • https://static.usrfiles.com/ugd/c3f88d_66e23624b3854950a5e918108dbf7b4b.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007261.bin
02886387d991b3227453108fcf9b000f3c21f0647745842702c56b51f2e9c8e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7261 5232 bytes
font_01_sfnt_off00008447.bin
7aa1612e01f0320a4a52dd8e0285b4b08a3413dcae8f583e58ee4f9fdce8d8c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8447 12408 bytes

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