Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6022f442020ba95…

MALICIOUS

PDF

53.7 KB Created: 2020-10-17 00:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18ba683764bac74844aea82e6a54431d SHA-1: 80d43a727b506c182a4d4cb33ea84b13f8531726 SHA-256: e6022f442020ba95bb996a8f8aaea40f909aad66f18982c13b915da84592b50a
152 Risk Score

Malware Insights

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

The PDF contains a link disguised as a 'word to pdf 2020 plugin' that redirects to a known malicious domain. This indicates a social engineering attempt to trick the user into visiting a malicious site. The ML classifier strongly supports the malicious nature of this PDF. The presence of a link farm further suggests 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.link/123?keyword=word+to+pdf+2020+plugin
    • https://cdn-cms.f-static.net/uploads/4367290/normal_5f89f95cdf0ef.pdf
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5f88229248e57.pdf
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f874bb0cd0c3.pdf
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5f8a0e0a4845b.pdf
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5f88b39197230.pdf
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5f8955f2e5057.pdf
    • https://uploads.strikinglycdn
    • https://uploads.strikinglycdn.com/files/f260aad0-3881-4a91-a514-f7f24d4684c0/12287572795.pdf
    • https://uploads.strikinglycdn.com/files/554b3861-bcdb-4256-b7b8-7639955ac52d/xugajumonake.pdf
    • https://uploads.strikinglycdn.com/files/acc5cb48-5a0f-41f9-9d6e-dee36f933255/1954443838.pdf
    • https://uploads.strikinglycdn.com/files/1528307a-74db-45d6-aadb-02a1d95ecfb3/23892341257.pdf
    • https://uploads.strikinglycdn.com/files/6e7bf0f0-ea2d-4577-81eb-4fd2a6981053/zuzos.pdf
    • https://cdn.shopify.com/s/files/1/0479/7992/1564/files/instructions_for_form_1040_year_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3021/files/alcohol_denat_chemical_formula.pdf
    • https://cdn.shopify.com/s/files/1/0482/8263/2347/files/zamil.pdf
    • https://cdn.shopify.com/s/files/1/0479/4443/3831/files/xokebudomafowarusagi.pdf
    • https://uploads.strikinglycdn.com/files/f1de4b49-8012-4661-bf11-9c17721857d2/15181202627.pdf
    • https://uploads.strikinglycdn.com/files/9da23511-d475-4b4f-b3e5-4acc631fe45e/83239151263.pdf
    • https://uploads.strikinglycdn.com/files/954a1ccc-a71f-4711-bb00-ef26eedbd4d3/19907620419.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_off0000927b.bin
6e128d73f1bf1acbe5674c4a10a446a222f367ae185d8e973cdb9ba80d87c3d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x927B 5108 bytes
font_01_sfnt_off0000a40b.bin
5dedf2e77baa94e01a5c8050acc87071f6759997928f88dfe0d34673888f6ac7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA40B 11036 bytes

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