Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ffbb9f642c7add…

MALICIOUS

PDF

44.2 KB Created: 2020-08-21 08:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17a5d2876651969fe5c058bd8b0e960b SHA-1: 1ce81bebf93a56cce1b958e3daa1a5d277dd5d62 SHA-256: a6ffbb9f642c7addd69f8efba5a1f4e855d01db3ef17a21d651199103e16bc58
128 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which, https://ttraff.cc/pify?keyword=pre+authorization+form+template, is identified as a malicious redirector. The document body text and heuristic firings indicate a lure related to 'pre authorization form template', suggesting a phishing or scam attempt. The file also contains a link farm pointing to numerous PDFs hosted on Shopify, likely for SEO manipulation to increase visibility.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=pre+authorization+form+template
    • http://files.alexandracarlson.org/uploads/1/3/1/1/131164176/9218741.pdf
    • http://files.tideriders.com/uploads/1/3/1/3/131379296/bukabijudunezugir.pdf
    • http://files.scoutmusichouse.org/uploads/1/3/1/4/131437005/8231836.pdf
    • http://files.tigroneypress.com/uploads/1/3/1/3/131379706/6e5c5e727.pdf
    • http://files.googliesandchinamen.com/uploads/1/3/2/8/132814476/7089451.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1298/files/bodies_by_rachel_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/7170/8065/files/gakerixufuzuzepegowalum.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0362/files/kulasubijijepekago.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/sagepubaroxonugezagim.pdf
    • https://cdn.shopify.com/s/files/1/0459/0452/7514/files/infrastructure_development_finance_company.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/cambodia_daily_news_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/79955704487.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3656/files/wusevamebonuwalitat.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7520/files/fobexivevuwilewomupegofip.pdf
    • https://cdn.shopify.com/s/files/1/0428/3462/4679/files/73056646292.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/76802096826.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_off00007169.bin
7fe8cb3b3f03603ab6fc06ef09014eb8941bd9011bc0552b3a58d59c56e169dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7169 5016 bytes
font_01_sfnt_off00008255.bin
486106f31c0eda461ad266889d24bf535b258a9feb9d859f077a8bd1e744be82
pdf-font-stream PDF embedded font (sfnt) at offset 0x8255 9880 bytes