Malicious PDF — malware analysis report

Static analysis result for SHA-256 a077b74ce9758948…

MALICIOUS

PDF

36.5 KB Created: 2020-08-30 19:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7275a337094fd396e9d5a269b102c22f SHA-1: 0e84733f2ff309c97a38230a63e5c02fee832078 SHA-256: a077b74ce9758948ea09caacdc1b2a263f00b31f8e724cf75e6a5032db8a5f56
120 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 malicious redirector. The document body, though partially corrupted, contains text related to 'baby memory book pages pdf' and includes the malicious URL. This suggests a social engineering attempt to direct users to malicious infrastructure under the guise of providing a document.

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/wix?keyword=baby+memory+book+pages+pdf
    • https://cdn.shopify.com/s/files/1/0430/9090/3193/files/88200226612.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/vajusogujom.pdf
    • https://cdn.shopify.com/s/files/1/0440/3927/4646/files/zokupuxesagexo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/putty_server_refused_our_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1792/files/68933692135.pdf
    • https://cdn.shopify.com/s/files/1/0440/4497/6278/files/sinubekabiriri.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/antivirus_free_quick_heal.pdf
    • https://cdn.shopify.com/s/files/1/0434/8962/4224/files/15530962154.pdf
    • https://cdn.shopify.com/s/files/1/0431/6663/0037/files/54099486093.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jaxigosileworu.pdf
    • https://static.usrfiles.com/ugd/dc98cc_7d5b7c12e359488aa3396d796ac0c5d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e0003f6df384570a96f39d9c6e2e33e.pdf
    • https://static.usrfiles.com/ugd/0d089b_169315b2572e43c98717502d832f2de8.pdf
    • https://static.usrfiles.com/ugd/b8c837_62ead4b5d7db4e8381977a53c9133e96.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_off00004ea1.bin
11bfb5d749408fc76e4db6f4151f9440d57f91d4cb99597578c9d6fa8ec9a51e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EA1 5684 bytes
font_01_sfnt_off000061e9.bin
395cb46f66755a172b5f14948bcf903fcc05c702ed95466b175d22fd47620956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E9 10376 bytes

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