Malicious PDF — malware analysis report

Static analysis result for SHA-256 21885969508bd8bc…

MALICIOUS

PDF

41.2 KB Created: 2020-08-22 05:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 849ac31851861c4b5528717ed8be7bb9 SHA-1: 1501236d2b6aa2990f452a8ea619a0f2709bf415 SHA-256: 21885969508bd8bc609e5d67f66ff386760b0554d1ba58d3a29ed88687297883
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a specific URL pointing to a redirector, likely intended to lead the user to a phishing site or a malware download. The document body mentions 'Belastingdienst aangifte loonheffingen 2018 en', a Dutch tax declaration topic, suggesting a lure for tax-related scams. The presence of numerous external links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking 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.com/pify?keyword=belastingdienst+aangifte+loonheffingen+2018+en
    • http://files.biophysical-ecology.com/uploads/1/3/1/4/131406356/xivut_girusidusowele_finusagon.pdf
    • http://files.flyhighlittlebunny.shop/uploads/1/3/1/3/131379443/4552009.pdf
    • http://gokuwa.applied-magnetics-shop.com/uploads/1/3/1/4/131437812/gorebodelun.pdf
    • http://files.juliewiegand.com/uploads/1/3/1/4/131453480/dd1b72145be5fa.pdf
    • https://cdn.shopify.com/s/files/1/0463/3873/6290/files/biwomadu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/38048561777.pdf
    • https://cdn.shopify.com/s/files/1/0435/7134/7619/files/wetuxowajurorutifuzitelo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/19654510420.pdf
    • https://cdn.shopify.com/s/files/1/0438/0449/1937/files/penukerarir.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/13705839777.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/d_nealian_cursive_handwriting_worksheets_printable.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/the_other_wes_moore_full.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_off00006243.bin
7c4d2e1ef3e8929e215a14550b5733e3a5ba7f5ec70749cdd9c6c50b607ce388		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6243 5640 bytes
font_01_sfnt_off0000756d.bin
13baec01ab2ab30aa9dabecfac672bd43d99b7d4e3458ab84a9f57344622137f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x756D 10268 bytes

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