Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea95fb884cbc97c…

MALICIOUS

PDF

121.0 KB Created: 2020-09-03 00:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 070d0786f5d02c8d999ef162e2cf7a8f SHA-1: af06c6ae41053e51edc8fa5d7658860838793838 SHA-256: 1ea95fb884cbc97ce43ddd6fcb774b60712a5140aded367440cc7448220525d1
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm. The primary malicious URL identified is ttraff.cc, which is known for redirecting to malicious sites. The document body, though heavily obfuscated, contains the same URL, reinforcing its role in the attack. No scripts were extracted, but the PDF structure and heuristics strongly indicate a malicious redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=blood+transfusion+guidelines+aabb
    • https://cdn.shopify.com/s/files/1/0434/7445/2632/files/19100130761.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/three_branches_of_government_worksheet_2nd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0428/9409/8598/files/sapagiwujep.pdf
    • https://static.usrfiles.com/ugd/b41a9a_cec115307dbd4d80be64969d831fd0c1.pdf
    • https://static.usrfiles.com/ugd/3fc21f_f5fb49b34e774e9fb728e37455470a2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ebaa75bf0de41ca8c478a6c151162ff.pdf
    • https://static.usrfiles.com/ugd/dd6616_4bb9920fc4ff48b797822e89a67eb65b.pdf
    • https://static.usrfiles.com/ugd/b8c837_da61417200a94ceba3db15df1b75b394.pdf
    • https://cdn.shopify.com/s/files/1/0435/8720/7327/files/rabipemowijito.pdf
    • https://cdn.shopify.com/s/files/1/0439/7203/4718/files/82551835924.pdf
    • https://cdn.shopify.com/s/files/1/0435/5912/5160/files/auto_tune_free_mac_os_x.pdf
    • https://cdn.shopify.com/s/files/1/0436/2970/7422/files/nutuxapamerixinuzewo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0741/files/figexunavitox.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0736/files/dijigokamovag.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/sobazonumafarewaxagul.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6056/files/fozodizaliwijak.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_off00019ff0.bin
8ae07a22aeaf7c9931028b04a49a4cf61287675d8df0771371f0275a1cb15a60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19FF0 5264 bytes
font_01_sfnt_off0001b1e6.bin
5d43238a4fcbce42535f694fbfd77d67d9771864d9150fb7900db2d08787e9f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1E6 11116 bytes

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