Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b72961bc36b5db…

MALICIOUS

PDF

41.2 KB Created: 2020-08-19 15:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b8bd22611c4446f5a9ac19322a78efb SHA-1: 53283aaa25b21b69d0a4bf2ee567ec69f01fddb3 SHA-256: 28b72961bc36b5db162470ef897884f1cf7e0d468a3f860443c4fcafa9f027a8
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'reporting' and includes the malicious URL, suggesting a lure to trick users into visiting a malicious site. The presence of a link farm and a redirector indicates an attempt to lead the user to a malicious payload or phishing page.

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.com/pify?keyword=stp+reporting+closely+held
    • http://files.onelegchallenge.org/uploads/1/3/0/7/130775413/newipefogu-nivazutibino-rufevila-zejis.pdf
    • http://files.arandrobison.com/uploads/1/3/0/7/130738940/8fd676170837d.pdf
    • http://fineki.apahcare.com/uploads/1/3/2/7/132741099/8305336.pdf
    • http://xisita.whatthefunkdenver.com/uploads/1/3/1/6/131636668/sipisekod.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/karibefewudipijedasi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wifufokamavobopizevotug.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8986/files/church_quarterly_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/lusawibuxujaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/82667356372.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/nipivozonofago.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/buzorurovuwufajimarex.pdf
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/dofesunawu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2902/files/migedimezu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/xubopawipojowixu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/tegobijifalisonezatenuno.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/97024072621.pdf
    • https://cdn.shopify.com/s/files/1/0451/9510/0311/files/ethnography_of_communication.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/chemistry_formulas_list.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_off00006218.bin
5ebae03f8e0e72138d4dcf5b0d13fc59fa79bb6bbe8e1049da8e44ee10cdd4d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6218 5328 bytes
font_01_sfnt_off00007439.bin
98ed891056a43299ed83e150837176d13a3ca2cd8133521f858f6dabe8e9ffd4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7439 10624 bytes