Malicious PDF — malware analysis report

Static analysis result for SHA-256 07eeed2407158361…

MALICIOUS

PDF

47.1 KB Created: 2020-09-19 15:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f3597b95af2167db2b980ab6bee3f27 SHA-1: b4c463daef5d41a632a1215369cdacb784794154 SHA-256: 07eeed2407158361bbdae6798cb3643dc42c36cf8c0bccb41d99ded3f25fcf1c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF also functions as a link farm, directing users to numerous external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest a phishing or scam attempt, likely using a lure related to policy documents.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=medicare+benefit+policy+manual+chapter+8+%2528pub.+100-2%2529
    • http://figudino.plasticfreegreece.com/uploads/1/3/0/7/130776021/mezug.pdf
    • http://zaratujem.allisonmariereyes.com/uploads/1/3/1/4/131453723/wakagijelelot.pdf
    • http://fikaranug.kingdomcleanllc.com/uploads/1/3/1/4/131438563/gusaputemajo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9371/1265/files/header_template_bootstrap_3.pdf
    • https://cdn.shopify.com/s/files/1/0432/8328/4136/files/nitrogeno_elemento_quimico.pdf
    • https://cdn.shopify.com/s/files/1/0465/2780/7646/files/spiderwick_chronicles_pc_game.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8514/files/deed_of_sale_of_motor_vehicle_scribd.pdf
    • https://cdn.shopify.com/s/files/1/0440/2577/4245/files/lupebeje.pdf
    • https://c8acec7c-ff7a-4e4e-98e9-3257cd2d8f88.filesusr.com/ugd/0df15e_107963f38aa54113a65084cf7a7ac95e.pdf?index=true
    • https://d0be4e62-bd38-4ee7-a25e-fee8d5614615.filesusr.com/ugd/868401_ead22273739a4b67a7042608f2b92551.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/10415438187.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68876684382.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/72318741149.pdf
    • https://cdn.shopify.com/s/files/1/0431/3091/2934/files/link_plug-_in_asio_output_driver.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075fe.bin
b13810253e3412fba6035c332e633ee54ea5f7047f00f58c4e46a1790ecee351		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75FE 6200 bytes
font_01_sfnt_off00008b1b.bin
0f4e6b686903e05a610e0962778314dbe1c49346fcad77f0f1562d9b18ee6f10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1B 10604 bytes

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