Malicious PDF — malware analysis report

Static analysis result for SHA-256 d810bad669ba05fc…

MALICIOUS

PDF

32.5 KB Created: 2020-08-13 07:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69743b9800ffce5b7f4f5830311e4c5a SHA-1: 66f0faba9ab99e922583b64b05a8ff3947703192 SHA-256: d810bad669ba05fc58e74974326004b218b7f92ec4c1506bf9fbb0f4b9e7cda3
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/wb?keyword=zaner%20bloser%20handwriting%20chart%20pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to handwriting charts and the authoring application, suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting the user to malicious infrastructure.

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/wb?keyword=zaner%20bloser%20handwriting%20chart%20pdf
    • http://files.springfieldrenaissanceschool.com/uploads/1/3/0/8/130814078/1699944.pdf
    • http://zonedix.mamawellacu.com/uploads/1/3/1/4/131407233/vevegikapizix-wiwoxirowoneg.pdf
    • http://files.marytherapeuticmassagenb.com/uploads/1/3/2/6/132682171/5d0758.pdf
    • https://cdn.shopify.com/s/files/1/0430/6914/5241/files/5394509802.pdf
    • https://cdn.shopify.com/s/files/1/0431/1112/1057/files/65148948721.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/vixuxifudaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/xulewititovufef.pdf
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/matugovodopobatulozozog.pdf
    • https://cdn.shopify.com/s/files/1/0438/7300/9819/files/wabekal.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2779/files/10381977098.pdf
    • https://cdn.shopify.com/s/files/1/0450/3309/5326/files/94242670560.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/buku_belajar_bahasa_jepang.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/56727342430.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/bubexizexil.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/87760431025.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2255/files/kokejipabikorevepavubiboz.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_off000042d5.bin
506e6841fb49feee75d5ad37d0ed9080732e3ed9cfd50632628a39e71884bb06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42D5 5608 bytes
font_01_sfnt_off000055ea.bin
032adfc2c13b6dbb35e68d1b281322ea6e1650e4368e3cd40f2cac7f5eeb74eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55EA 9220 bytes

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