Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff2e5bff7cc9081…

MALICIOUS

PDF

46.3 KB Created: 2020-08-08 02:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 785d7bd689be7e7b5f7a27611db118b4 SHA-1: 489a3112613faec78267093b41c0a577a338ff42 SHA-256: eff2e5bff7cc9081631ce09e2cf19a443a3cef706fd64aa40e2a5194f8a2a833
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to a known malicious redirector. The document body, though partially corrupted, includes the same URL, suggesting a lure to external malicious content. The presence of numerous other PDF links, many hosted on Shopify, points towards a link farm or SEO poisoning tactic to distribute the 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.ru/pify?keyword=el+interes+superior+del+ni%25C3%25B1o+pdf
    • http://files.graceelmira.org/uploads/1/3/1/4/131483662/sinojazedisi-mutevareja-jaretalaxeme.pdf
    • http://files.thevipbeautystudio.com/uploads/1/3/1/4/131455621/9969133.pdf
    • http://lejul.doresangha.com/uploads/1/3/1/3/131380600/jopuwamaduzemel.pdf
    • http://gatedimix.madelinedesigns.net/uploads/1/3/1/3/131379803/puwozebobowe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16711599054.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdf
    • https://cdn.shopify.com/s/files/1/0429/5865/1545/files/fl_studio_full_version_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9045/files/bls_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/1152/9114/files/paguvepuxirafe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5407/9910/files/17836437070.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/58150215581.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/gixenixipetajilim.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/keniv.pdf
    • https://cdn.shopify.com/s/files/1/0437/3564/6357/files/ap_eenadu_epaper_today_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006644.bin
f7e56646ff2aff1bb6ce30174b209aeb069e483b5db5a169c169aaa9699984bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6644 4876 bytes
font_01_sfnt_off000076a3.bin
d9f38817e86e30115200854d0c117b9146671558b62283ba38e083e9519fb2d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A3 11768 bytes
font_02_sfnt_off00009c33.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C33 4324 bytes

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