Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7a67b2b2423f2da…

MALICIOUS

PDF

41.4 KB Created: 2020-08-01 15:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b109208416f88a39e983f2513b79855d SHA-1: 6f89dc800cdca2c6b3340b8bd8f954ef3e18faa5 SHA-256: f7a67b2b2423f2dab67a42dc58ee7031c27f2b66cad84714d4429c2b04b91246
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.003 Windows Command Shell

The PDF contains a large number of embedded URLs, many of which point to a link farm hosted on Shopify. One of these URLs, 'https://ttraff.com/pify?keyword=post+request+curl', is identified as a malicious redirector. The presence of a visible LOLBin command execution instruction suggests that the document is designed to execute commands or download further payloads. No scripts were extracted from this sample.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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=post+request+curl
    • http://files.gtdphil.org/uploads/1/3/0/9/130969438/4623576.pdf
    • http://files.sotilloinsurance.com/uploads/1/3/2/6/132682806/18ea4563.pdf
    • http://files.wendywangauthor.com/uploads/1/3/0/7/130776821/a773555f5ac2.pdf
    • http://files.lauraspreciouspomeranians.com/uploads/1/3/1/3/131379615/8733610.pdf
    • http://files.halloweencity.ca/uploads/1/3/1/3/131380345/wafezi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1137/4230/files/583924943.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zukukujumifuxutage.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23281911610.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/77214252917.pdf
    • https://cdn.shopify.com/s/files/1/0434/9588/2918/files/2975804854.pdf
    • https://cdn.shopify.com/s/files/1/0437/7319/8497/files/157943310.pdf
    • https://cdn.shopify.com/s/files/1/0432/7974/5192/files/pifosajilugivuta.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6938/files/6492285900.pdf
    • https://cdn.shopify.com/s/files/1/0440/9648/7576/files/mojaxokaxejeli.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/vujuluzogevekufabufesumif.pdf
    • https://cdn.shopify.com/s/files/1/0431/0509/1745/files/38057951518.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6689/files/85766377223.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51031200676.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_off0000595b.bin
b70093540563ac612a4c630d9dd705c3d686515b3261d9dbf9e0f3ea4f04bc1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x595B 4708 bytes
font_01_sfnt_off00006975.bin
228540d3b6ff5f0c99a401201545d16ad7ca2adfd51616ed23ea51a9018cb038
pdf-font-stream PDF embedded font (sfnt) at offset 0x6975 15084 bytes