Malicious PDF — malware analysis report

Static analysis result for SHA-256 8521458d6cb437ed…

MALICIOUS

PDF

46.9 KB Created: 2020-08-25 13:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3766e04ec11493c349d3a1a7cccf816b SHA-1: b56937feaf377e6593adc683d01d8443d80f40f9 SHA-256: 8521458d6cb437ed8bc5bd6898f5c5d91e528ecd60310cf083e1718797e88945
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body and heuristics suggest a lure related to 'email templates' and 'invoices', aiming to trick users into clicking the malicious link. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=email+templates+freepik
    • http://kosik.leticiahuerta.com/uploads/1/3/1/8/131871699/zapuxodoxutes.pdf
    • http://files.ausmazehanatkhan.com/uploads/1/3/1/4/131483719/nakokudifaxovukejet.pdf
    • http://files.aplusservicesnz.com/uploads/1/3/2/6/132695629/vuzuzi.pdf
    • http://files.cupidsinspirationuk.com/uploads/1/3/1/3/131381640/juxuvokop.pdf
    • https://cdn.shopify.com/s/files/1/0432/1850/1799/files/dear_santa_letter_template_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0920/files/44148221213.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/83612064330.pdf
    • https://cdn.shopify.com/s/files/1/0433/5462/0059/files/wepemolefopogabiwulo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5672/6165/files/sagikavemobajuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0011/0999/files/dogegusikonorupafivoro.pdf
    • https://cdn.shopify.com/s/files/1/0430/3339/5353/files/mokibagedumeluvigikurexux.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_off000079c7.bin
e292bf00570b61a8d521ec99165a55177063ad8d92bbf02a66d304cfe7c0f934		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C7 5068 bytes
font_01_sfnt_off00008aec.bin
d250175651e0ba2be1d4eb508ff74a4943d161edc0c03b1fb3e03780aa3dc291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AEC 10784 bytes

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