Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8380bd8450a8fd…

MALICIOUS

PDF

48.9 KB Created: 2020-08-19 12:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 048c22d9b1069e3477f1542ddd033991 SHA-1: e11f2af7874eb95ada05d544371c2ea0ada68e70 SHA-256: 0b8380bd8450a8fdb89661b269b349d4e8433458e0e539173ce2b525499816fa
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one pointing to known malicious redirector infrastructure at `ttraff.com`. The document body, though heavily obfuscated, contains text related to 'udl lesson plan template' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of many PDF links indicates a link farm, likely for SEO manipulation or to host further malicious content.

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.com/pify?keyword=udl+lesson+plan+template+google+doc
    • http://files.shoptoco.com/uploads/1/3/0/7/130739069/fizewatatewir_kivutubudi_vetilu_segogelodupotak.pdf
    • http://files.hrcpobirthday.com/uploads/1/3/1/3/131397946/5cc0f01d.pdf
    • http://verulato.jerylchurch.com/uploads/1/3/0/8/130813509/dilixifekig_xoxepezaw_sirevikabinuzom_jekewiwam.pdf
    • http://files.fireflyflowerfarm.com/uploads/1/3/2/6/132682897/1081627.pdf
    • http://jazot.scmscounseling.com/uploads/1/3/1/0/131070450/e1b2f42aea.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9371/1261/files/barcelona_pavilion_plan.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/brain_teaser_worksheet_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/63450604879.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9566/files/punctuation_marks_and_their_uses_and_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0471/files/damadutukipa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lebalod.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7194/files/suffixes_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0448/2521/5133/files/55537153682.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1437/files/behaviorist_and_nativist_theories_of_language_acquisition.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/pdf_file_kaise_banayenge.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_off000080d6.bin
7c12564bd4668965b944ce280202984777b2ad39a0c657a3ae2da96d946b17fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80D6 5288 bytes
font_01_sfnt_off000092c4.bin
52643e9e4294f885a62be7f3fe6fa8760c27485f7d0ac94e49d924987bfae895		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C4 10396 bytes

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