Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5e53f2e5dde7b2…

MALICIOUS

PDF

50.6 KB Created: 2020-08-03 17:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fbd1c9cf99b06576a5c303ab49bc1c1 SHA-1: 29888101eff9212d00d216d65b3a314c91c0f2a7 SHA-256: ea5e53f2e5dde7b2b46c45f91218631be62df486765db92289740794c230f796
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, directing users to a URL that appears to be part of a link farm. The document body, though heavily obfuscated, contains text related to '3d max tutorials interior design pdf' and the malicious URL itself. The presence of numerous external PDF links, many hosted on Shopify, suggests an attempt to obscure the malicious redirector and potentially engage in SEO manipulation for malicious purposes.

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.cc/pify?keyword=3d+max+tutorials+interior+design+pdf
    • http://files.m2students.net/uploads/1/3/2/7/132741382/fukeva.pdf
    • http://files.lexscholarship.org/uploads/1/3/0/7/130775251/3f654.pdf
    • http://files.estee-compliance.com/uploads/1/3/2/7/132740637/ganoxugarekunanoxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8019/files/accounting_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/457668218.pdf
    • https://cdn.shopify.com/s/files/1/0439/9228/5342/files/sotolezugovejabasir.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9401/files/detusevonufapagidujunusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0675/4970/files/57278218119.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/87397323482.pdf
    • https://cdn.shopify.com/s/files/1/0439/0230/4408/files/31696145252.pdf
    • https://cdn.shopify.com/s/files/1/0432/7745/1428/files/netenemivajekevi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5864/2600/files/tovilumupapufuxufaxuva.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/muzotimebone.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9667/8301/files/45878144625.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_off000086ac.bin
ea98f4c6eb22375a4a35fe47190c7c0a3b136e54bdb426f5f7ffab49a9509967		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86AC 5500 bytes
font_01_sfnt_off0000994e.bin
fa8eb2ff72bc643ab14dc1d7e0da1b2c73c34505933fafad0ef71c77bf6148a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x994E 10848 bytes

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