Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d8cf6c052c8fe9…

MALICIOUS

PDF

39.9 KB Created: 2020-08-11 23:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b281036fe275dd3dce635591dae06b61 SHA-1: ed8064b58fe3008c040e71d3a964716460d6c913 SHA-256: 05d8cf6c052c8fe9a794a597f3edadca0908933da85ef3fcb036611d01a49195
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a search result for educational content. The document body and embedded links suggest an attempt to trick users into visiting malicious infrastructure. While no scripts were directly extracted, the PDF structure and heuristics indicate malicious intent, likely involving redirection to a further exploit or phishing page.

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=cambridge+primary+science+activity+book+4+answers+pdf
    • http://mabakog.cleanrecordillinois.com/uploads/1/3/0/9/130969057/e55d6c54117a.pdf
    • http://files.messianiclaw.com/uploads/1/3/1/4/131454620/2255095.pdf
    • http://files.malvernehistory.org/uploads/1/3/0/7/130775490/603dbcbf8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4640/2213/files/rilalotivezamuwifan.pdf
    • https://cdn.shopify.com/s/files/1/0428/4999/2860/files/javascript_download_blob.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6127/files/64754069162.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/60295022938.pdf
    • https://cdn.shopify.com/s/files/1/0429/8961/7311/files/71057000104.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1473/files/balogh_mary_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/fitufeniziripetiga.pdf
    • https://cdn.shopify.com/s/files/1/0434/4755/0119/files/bentley_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/52282860895.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3133/files/93044415897.pdf
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/oceanic_time_warner_cable_tv_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2190/files/mojenefiropod.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004540.bin
ca3e24082d83bd236d05ca8f6967578efcf906d3a3de4aeb92af5b960ec43e0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4540 5896 bytes
font_01_sfnt_off00005962.bin
67b3d3383d3cce6418f4a7f7cfad8fc5faf37a04a628642a3541d55af90ac988		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5962 9404 bytes
font_02_sfnt_off000079cf.bin
6ff7b0b7ad6305e56d779a7795f967aa0c8f1e4520e0a7b9f194f956498f2dc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79CF 16996 bytes

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