Malicious PDF — malware analysis report

Static analysis result for SHA-256 47fab9b535ca4b68…

MALICIOUS

PDF

41.1 KB Created: 2020-08-22 12:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b701e52116a79059d1b85894fc7f9ed SHA-1: 2133dcf5841aba9f23c22b7d4f881055a50524d3 SHA-256: 47fab9b535ca4b68a7cabe6621d6d6dbbab2ba7fad0fc494cf11fd0c1e25f0b3
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a worksheet, aiming to lure users to a harmful site. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the embedded URL strongly indicate this malicious intent. The PDF also contains a link farm, suggesting it's part of a broader SEO poisoning or traffic generation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=new+york+state+map+worksheet
    • http://files.nbouliane.org/uploads/1/3/1/4/131437987/3927071.pdf
    • http://files.homerenovationsbyweigand.com/uploads/1/3/0/7/130738596/tapajenujiti-wefeziverori-fevedivu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/35416642210.pdf
    • https://cdn.shopify.com/s/files/1/0431/8242/4215/files/childrens_fleece_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/81601308213.pdf
    • https://cdn.shopify.com/s/files/1/0434/9083/6645/files/13644953777.pdf
    • https://cdn.shopify.com/s/files/1/0452/9192/9761/files/persuasive_writing_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/ketoto.pdf
    • https://cdn.shopify.com/s/files/1/0431/5771/7152/files/gukuzitosasuwamorine.pdf
    • https://cdn.shopify.com/s/files/1/0431/6512/2720/files/dizawalufututi.pdf
    • https://cdn.shopify.com/s/files/1/0464/9543/2872/files/dietary_guidelines_2015_sodium.pdf
    • https://cdn.shopify.com/s/files/1/0432/4209/4755/files/13230579271.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8102/files/vogonijelavozov.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/mufaviputamora.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/how_to_write_the_date_in_german.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_off00006204.bin
e9e3fb353b5685481970ed224475e3fe3efedd508625db749c5019b3ba49b1f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6204 5252 bytes
font_01_sfnt_off000073dd.bin
59182945fccd9d74c02628106e3173813369bb8bfdfcf9c340e5c588bc3196fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DD 10544 bytes

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