Malicious PDF — malware analysis report

Static analysis result for SHA-256 703b9d38160d50d4…

MALICIOUS

PDF

39.5 KB Created: 2020-08-24 05:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f4236d001e558a9ab78ef0c4f227351 SHA-1: a6f4681e6b2f786771d993f75388aba90e71056e SHA-256: 703b9d38160d50d4adde35d92c0ade39e3804dbf9b59bb97e218af1933726d31
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of embedded links, many of which point to what appears to be a link farm designed to generate traffic. One prominent link directs to a known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document's structure and embedded links suggest a phishing or redirection attempt.

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.ru/pify?keyword=greenhouse+monitoring+system+project+report
    • http://gilasatu.hungryformoneyy.com/uploads/1/3/0/7/130739615/zoxuv-mogutoja.pdf
    • http://nozekuniv.nicolanotes.com/uploads/1/3/1/3/131378780/0f1635147da.pdf
    • http://xetafe.2020pray4galway.com/uploads/1/3/1/6/131606407/wuluxiditumikirosori.pdf
    • http://files.kellicatesmusic.com/uploads/1/3/1/4/131453421/savowujunino.pdf
    • http://files.galerieboisbrule.com/uploads/1/3/0/7/130775557/gorer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/zegonavajuvubunatelip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0828/6105/files/25537971890.pdf
    • https://cdn.shopify.com/s/files/1/0431/2979/8807/files/xopedixidu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/rawegadazekojujimogajo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3347/5737/files/addition_subtraction_multiplication_and_division_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/8404/4705/files/ffxiv_useful_macros.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0273/files/tasufitawonokofidikaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/gagas.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/girotepazuzo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3942/2626/files/roxuradimasawajisivuk.pdf
    • https://cdn.shopify.com/s/files/1/0447/3890/4218/files/estadistica_descriptiva_ejemplos.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_off00005c45.bin
dd4ebdccd16f4201d3e7ceb2a25db0f4091e257f1563c8bd147f9163df038ee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C45 5312 bytes
font_01_sfnt_off00006e41.bin
0d218a163a54e1bbe4ae6ff22e1b068a10f9ab3fc203f67e32f35d891c5e0d31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E41 10104 bytes

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