Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef1483b5a05cdb9…

MALICIOUS

PDF

35.0 KB Created: 2020-08-20 05:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a09531e8a7b8aacca2ac14e27919a30a SHA-1: b80c4aaef2cc411fc1a5dbb0bd7ca96edf3ba1bb SHA-256: 3ef1483b5a05cdb90f907187da71041f02aa83d91fb81385b8926ecd00ee8d24
150 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, primarily through its extensive use of embedded links. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that at least one URL, https://ttraff.ru/pify?keyword=islamic+boi+pdf, leads to known malicious redirector infrastructure. Furthermore, the PDF_SEO_LINK_FARM heuristic suggests a large number of external links are present, likely to obscure the true destination. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious verdict. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=islamic+boi+pdf
    • http://files.hiddengem.net/uploads/1/3/1/4/131414134/bupajizuja_fatuz_dofixupor_zugoluvenijobu.pdf
    • http://files.poemsalongtheway.com/uploads/1/3/1/8/131871907/3367815.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6841/files/86380536447.pdf
    • https://cdn.shopify.com/s/files/1/0437/0789/1863/files/35697910801.pdf
    • https://cdn.shopify.com/s/files/1/0436/0696/6429/files/43437399330.pdf
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/built_in_bookshelf_plans.pdf
    • https://cdn.shopify.com/s/files/1/0447/9811/6006/files/26797667966.pdf
    • https://cdn.shopify.com/s/files/1/0433/3908/8027/files/zevizaliwodatomowakujuvox.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/foxit_reader_for_mac_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/49011264908.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/wosekaxenetiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/nowefewu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/lotodapipewegozitosijovi.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_off00004ad6.bin
12164458abc667a42c0a41a0159c8a1461a7dd3d3e424682f7f763c23eab42c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD6 5280 bytes
font_01_sfnt_off00005ca5.bin
1410c2a6184db80853289b4aa9ba45202e0ed9afefa7cf40d7418e6bd37a5059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA5 10256 bytes

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