Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc429946b92c0fb…

MALICIOUS

PDF

43.0 KB Created: 2020-08-01 07:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d4107d3d55af3fca5f38ee43eb65a5a SHA-1: cd91fc5e9b255d3cf32c72813d857fd46df88bc2 SHA-256: 2fc429946b92c0fb12610bcc4f4096a580cfa1e372c41b99e864c000217e5473
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary link to a known malicious redirector. The document body, though heavily obfuscated, contains the same lure text and URLs found in the heuristics, indicating an attempt to trick users into downloading further content. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=intro+stats+4th+edition+pdf+free
    • http://files.cksweets.com/uploads/1/3/0/8/130813782/tufisozajel.pdf
    • http://files.nakedcakesgallery.com.au/uploads/1/3/0/7/130740012/vudeze.pdf
    • http://files.johnlinneball.com/uploads/1/3/1/3/131379054/gulir.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3079/files/15921271769.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/78960138504.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6017/files/nokakagipotobusuxugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8008/9760/files/kilivuziroxega.pdf
    • https://cdn.shopify.com/s/files/1/0434/3323/0488/files/if_statement_c.pdf
    • https://cdn.shopify.com/s/files/1/0438/1212/6882/files/gafuxolikofavobo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8752/files/80580918137.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/11481923379.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/levezupopanunef.pdf
    • https://cdn.shopify.com/s/files/1/0441/3181/1480/files/99191619494.pdf
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/61420442966.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/79725882476.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_off00005cf3.bin
5d247eda77789fa1b1ff2ada989f9f622d441d7737ac8ac7ed81e6f66332a947		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF3 4912 bytes
font_01_sfnt_off00006d96.bin
225aa94d7bac86677c083df8645e15395a12559fd78edd973e233b9b21792dab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D96 10500 bytes
font_02_sfnt_off00009141.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9141 4324 bytes

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