Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5914a1b55622b43…

MALICIOUS

PDF

44.8 KB Created: 2020-08-06 17:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b804a79cece4f4f6f67cf3e2cded1a7 SHA-1: 8c37bd958e58c11c0411a5db8fbd79011411f79f SHA-256: a5914a1b55622b4304029273e3579e9cc13a5d32deb1a56cd87b19270ad5853e
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Bibel pdf einheitsübersetzung download', suggesting a lure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=bibel+pdf+einheits%25C3%25BCbersetzung+download, which is likely used to redirect the user to a further malicious destination. The presence of numerous links to Shopify domains, while some are benign, suggests a link farm technique to improve search engine visibility for malicious content.

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=bibel+pdf+einheits%25C3%25BCbersetzung+download
    • http://delupuze.baywestps.vic.edu.au/uploads/1/3/2/6/132695278/wegegatonesil_gonazazuneg_fesapobanig_livug.pdf
    • http://files.openmindimprov.com/uploads/1/3/0/8/130814056/7fe77a2.pdf
    • http://files.dalycitytowing.org/uploads/1/3/1/4/131452903/dibosolomo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3128/8216/files/43861724879.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/votelusojewamamoxef.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/26326230491.pdf
    • https://cdn.shopify.com/s/files/1/0438/3100/1250/files/71859437526.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/benepulenofu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6649/0006/files/1189726395.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2316/files/pudusexojamusavibar.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4689/files/30148250166.pdf
    • https://cdn.shopify.com/s/files/1/0434/9716/0866/files/posenomo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8019/7031/files/hemostasis_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0435/1292/2264/files/xijefoxi.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_off00006bff.bin
a0d5d79458316ef15acff25432b2acbd6edf56c133a0006d4d2eab7fa351abad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFF 5752 bytes
font_01_sfnt_off00007f71.bin
196dadef540f0d6ad1b230b457e9654cc9b4b55a196ed4c0424a62ac183bb2b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F71 11352 bytes

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