Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f13c1dfbabd349…

MALICIOUS

PDF

43.3 KB Created: 2020-09-01 01:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4948a8cc4b3680d5f29eec864f9b5654 SHA-1: e1cad98b73e64f1e6a8fdef33120cf3d123700e5 SHA-256: 57f13c1dfbabd349d64d66be97a570371f538815f31c20f2007134c18c0e162f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/pify?keyword=prime+factorization+worksheets+grade+4+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. The file also contains a large number of external links, characteristic of a link farm, further supporting the malicious intent.

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.club/pify?keyword=prime+factorization+worksheets+grade+4+pdf
    • https://static.usrfiles.com/ugd/0779a3_a0ca4bc503f64924bc272b6261886893.pdf
    • https://static.usrfiles.com/ugd/83f04e_a15aaae68bc04caea741a3dde5252d42.pdf
    • https://static.usrfiles.com/ugd/b4609a_09485cdc4c0e4da2a5a62d0ec3943096.pdf
    • https://static.usrfiles.com/ugd/7198c1_a4fe7744e3ab415f8214ad749fc43829.pdf
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/menaruxuririb.pdf
    • https://cdn.shopify.com/s/files/1/0430/4853/4167/files/65001952291.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/dirif.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/human_anatomy_and_physiology_lab_manual_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/34698075140.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/weather_report_fridley_mn.pdf
    • https://static.usrfiles.com/ugd/29c71c_5b8d9bdda63c4d76b28f306881841e79.pdf
    • https://static.usrfiles.com/ugd/01e791_f0b63a65bc9c4b7bb612f9846dc5412a.pdf
    • https://static.usrfiles.com/ugd/122077_5d60dd010bc640cdb2258b8122d44dde.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_off00006a2e.bin
b58a36df2bb82bc54ff09bd8b2e1f45307789cee3faddc06322e833890c6f409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2E 5832 bytes
font_01_sfnt_off00007e05.bin
e8b0c42d33bb655e23581835649e218eb9495db357fd24b9ab4b8edc7136a2d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E05 10120 bytes

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