Malicious PDF — malware analysis report

Static analysis result for SHA-256 4969cdd67a0f4773…

MALICIOUS

PDF

50.8 KB Created: 2020-08-03 02:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d59f100706ca7b8e4566da9f738e99d1 SHA-1: af9b33af0426434443eab4c544de6accefe0508d SHA-256: 4969cdd67a0f47738b659840d2747ade730b73013137dbd0d85cf0ebfe3d6d72
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=counter+strike+source+tutorial', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'counter strike source tutorial', suggesting a lure to entice users to click the malicious link. The presence of numerous other links, many pointing to Shopify domains, indicates a link farm strategy to potentially obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=counter+strike+source+tutorial
    • http://files.fairwindsllamas.com/uploads/1/3/1/6/131637374/lakanadopo-fodir-mizulifebugobu.pdf
    • http://files.valuetrainsusa.com/uploads/1/3/1/6/131636825/740c75f538b0.pdf
    • http://files.nayaraduran.com/uploads/1/3/1/6/131607712/betojizivukarev.pdf
    • http://files.solopipingjudges.co.uk/uploads/1/3/0/7/130775971/7342805.pdf
    • http://files.gleesonreboots.com/uploads/1/3/0/8/130814043/wafivozuwika_xomom_wusarixo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0805/files/29157173611.pdf
    • https://cdn.shopify.com/s/files/1/0427/4506/9724/files/dasamomifutedim.pdf
    • https://cdn.shopify.com/s/files/1/0439/7809/6798/files/53284576845.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7452/files/vugetifed.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2261/files/85558804738.pdf
    • https://cdn.shopify.com/s/files/1/0429/2401/5783/files/zulire.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4008/files/domefaladexasu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9563/6633/files/lerurosupanelipikefuwoso.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/pivozisixasodip.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2103/files/kobogesuxalurikezen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.pdf
    • https://cdn.shopify.com/s/files/1/0436/2865/8848/files/62587329431.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_off000073bb.bin
dfebf4357d66cdda46ad2c8e8389b65279e67f29dbf36084b7bf475d990943db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73BB 4760 bytes
font_01_sfnt_off000083f8.bin
473933a23fe8ccaa832734ea6f7162c0d95d59119ba108978f3ec83cb4761e63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83F8 10452 bytes
font_02_sfnt_off0000a7ff.bin
69d723212eb6dd1954cef9b4649bd4df6eb17a6f495b2db8137d34beed6776af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7FF 16332 bytes

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