Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc52f2c845213de0…

MALICIOUS

PDF

47.9 KB Created: 2020-08-28 12:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22dce5d193ac780729a179ee4b3925bc SHA-1: 6c7c3da96922af63aec2f8030a68c4d81bf7bae3 SHA-256: cc52f2c845213de0f067c6497225a5238573bee49d82d57c6b8d62f7c6b59ce0
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically the URL https://ttraff.cc/pify?keyword=jgr+solid+earth+latex+template. This indicates a social engineering attack aiming to trick users into visiting a potentially harmful site. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=jgr+solid+earth+latex+template
    • http://files.leehighwayalliance.com/uploads/1/3/2/3/132302859/geralixerenon.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/p90x_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/34489734561.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/kexigemifijedodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9221/files/living_environment_regents_review_questions_by_topic.pdf
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/kemibu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3795/7023/files/13351168927.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/kotiravuzerefagilenofuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75278808376.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5545/files/barcelona_street_map.pdf
    • https://cdn.shopify.com/s/files/1/0447/4513/0133/files/39706139925.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_off00007cf3.bin
2d7327cb44008bc29c1e670edf2457fdc920a85fc994980b3725ac3ed0bfeebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF3 5432 bytes
font_01_sfnt_off00008f47.bin
49ab079b99910f6c32379f446f6c3cd8842e46efd70029e2503a6624342c4507		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F47 10376 bytes

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