Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e96e5ab3193b53…

MALICIOUS

PDF

37.5 KB Created: 2020-08-26 03:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 361cb88d088de582ca5c46d0091a5cd0 SHA-1: 0656571cfeba38579d6fa9fd05bc8dc0b45b9623 SHA-256: e9e96e5ab3193b534b7c5f200aeda27e39b791f933f2f8648c9169e41a428b7c
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'high school progress report form'. This link, 'https://ttraff.link/pify?keyword=high+school+progress+report+form', leads to known malicious infrastructure. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, suggesting an attempt to distribute or obscure malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/pify?keyword=high+school+progress+report+form In PDF document text
    • http://files.litturi-photography.com/uploads/1/3/0/7/130776386/bdfb38cc419.pdfIn PDF document text
    • http://files.chicagonightlifepass.com/uploads/1/3/1/8/131872087/cc887fb5.pdfIn PDF document text
    • http://bazuse.simmsband.com/uploads/1/3/1/8/131857247/najiruzasej.pdfIn PDF document text
    • http://latepunuv.operationrv.com/uploads/1/3/0/7/130738568/dipegefodalebejum.pdfIn PDF document text
    • http://files.housecallshomeinspection.com/uploads/1/3/1/4/131406437/famamub-timodozurofeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8153/1541/files/wetexedepiwojoridazavof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7401/0782/files/24229806657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7964/7900/files/28417271242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/10938756446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3723/6119/files/biology_question_paper_for_class_11.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0800/0163/files/lixibufedapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/63480364461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8190/7870/files/larebifevifofene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4388/0103/files/fufovuzajatujuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/38584920435.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49A6 4864 bytes
SHA-256: 2ee4b2bbf727031762dc0802d7ad9e15c7d81694cb072baae8074d5e2d5c8f82
font_01_sfnt_off00005a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A35 9656 bytes
SHA-256: e98bc9105b268655fdfb88fd080f96ae0e0152d2665818e4bf10a6eee7624f23
font_02_sfnt_off00007b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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