Malicious PDF — malware analysis report

Static analysis result for SHA-256 553cc48f25d6be77…

MALICIOUS

PDF

49.5 KB Created: 2020-08-13 16:39:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dcc5084ca32eead40d3c604fb1e1bdb SHA-1: 9766c81ac75eb24d27e8df2a25e1707e2c0cbe9f SHA-256: 553cc48f25d6be776e9abcff14ea9c2cecdfc08114a52e822103ffdb0bef4405
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic firing indicates that the document links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/wb?keyword=plasmid%20vector%20pdf'. This suggests the document is designed to redirect users to malicious sites. No scripts were extracted from this sample.

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/wb?keyword=plasmid%20vector%20pdf
    • http://files.susanfonger.com/uploads/1/3/0/9/130969505/1870495.pdf
    • http://fovumove.upstagenydanceacademy.com/uploads/1/3/2/6/132680955/d4950688.pdf
    • http://kenovaduw.healthydancercanada.org/uploads/1/3/1/8/131856584/037e7a3f746.pdf
    • http://goguni.paulallenhill.com/uploads/1/3/0/8/130814328/9ebc1.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/fore_bearing_and_back_bearing_problems.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovovowegafakaroseras.pdf
    • https://cdn.shopify.com/s/files/1/0431/9235/2928/files/53711995439.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/xujaba.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/78688860424.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/kasabesu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/lawepiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1941/9291/files/63160923872.pdf
    • https://cdn.shopify.com/s/files/1/0437/7359/1703/files/jawusamedejakujubit.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/49803699943.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/8761/8463/files/accounting_information_systems_controls_and_processes_download.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_off000084ba.bin
a1510a93b789e8939057da188e628a4fcff2c8fea976c0f1a710555c3fb3ad58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84BA 5364 bytes
font_01_sfnt_off000096e3.bin
e98065e324df79ddce52af2b6e921c9b193fa98e0ed51b8d7358ad797c17144a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96E3 10076 bytes

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