Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46291ff032715fe…

MALICIOUS

PDF

70.5 KB Created: 2020-08-31 03:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f664d96198e2eedc8ff4b0e815d1bc8 SHA-1: 6f0abb005f26c618e2a8b07b296c127c2fd96ade SHA-256: b46291ff032715fe6ecc8b5c55dca57fc78546f806844d23be3861ca149c4a7a
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=precalculus+with+limits+3rd+edition'. Additionally, another critical heuristic indicates a PDF link farm with 26 external links, many hosted on cdn.shopify.com. The document body contains the same malicious URL, reinforcing the lure. No scripts were extracted, but the primary attack vector appears to be directing users to a potentially malicious site.

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.cc/wix?keyword=precalculus+with+limits+3rd+edition
    • http://www.LarsonPrecalculus.com
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/6482732242.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/sample_student_autobiography.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5174/files/sasamovarefurexuvilofuxas.pdf
    • https://static.usrfiles.com/ugd/b48b60_0b05c0bc75b6477f83299510f03b6578.pdf
    • https://static.usrfiles.com/ugd/7ff653_09f493f6abbe418ea813c6784b9a40a5.pdf
    • https://cdn.shopify.com/s/files/1/0429/5835/6639/files/gumapofisusaxidu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2045/8906/files/inkstar_tattoo_machines.pdf
    • https://cdn.shopify.com/s/files/1/0457/8630/0572/files/zulowavixakotot.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8102/files/delitadokurexamutuze.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43561311815.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8a150c37262438780fc918b9154f90a.pdf
    • https://static.usrfiles.com/ugd/8b49c6_80a76790d20447d8ba8b339e1b6a1db5.pdf
    • https://static.usrfiles.com/ugd/e2f197_14fb65e6fe934a64bcb52cf5da9b2e3d.pdf
    • https://www.nxtbook.com/nxtbooks/ngsp/finan
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b909.bin
d13efa2b178a0d6f6a71d2e75109d9be0bd96e8f413ffec46575cf9c289706b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB909 5436 bytes
font_01_sfnt_off0000cb5d.bin
563ff871a32aefe152fff63629615dbb70daefda9b24d85e92e7a7c9c13dda15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5D 14060 bytes
font_02_sfnt_off0000f752.bin
6820151f9a4816bccc9e85e605aef44ce22c8924dfcccd161584754f275bf028		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF752 16132 bytes

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