Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c95417ca6bf2e7…

MALICIOUS

PDF

58.9 KB Created: 2020-09-02 13:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fc2d202a9204f70adef3ae16393065f SHA-1: 82a6bd20a9007ec7b29a6d75f9a9a6f16358ddd3 SHA-256: 61c95417ca6bf2e714796cc3d291ae184608ef21e818d0a8b2dd6f7d3a16e380
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, masquerading as educational material. One of these links, 'https://ttraff.link/pify?keyword=concrete+technology+objective+questions+with+answers', is identified as a malicious redirector. The document's structure and the presence of these links suggest an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing.

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.link/pify?keyword=concrete+technology+objective+questions+with+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/the_outhere_brothers_boom_boom_boom.pdf
    • https://cdn.shopify.com/s/files/1/0430/7009/5521/files/mukafatopikewoduza.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/article_fill_in_the_blanks_with_answer.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/dodozutures.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/estrategias_de_aprendizaje_concepto.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zebegevuda.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6918/files/bujawoxipon.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5590/files/bonaire_swamp_cooler.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/quadratic_equation_form_3.pdf
    • https://cdn.shopify.com/s/files/1/0438/6160/6565/files/argentina_croatia_match_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/0813/1233/files/injection_blow_molding_process.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/jobabatenezataparofilib.pdf
    • https://cdn.shopify.com/s/files/1/0436/5778/9593/files/john_deere_8300_grain_drill_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4143/9400/files/52109048812.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a3f.bin
4b76190a720d5ffb0dd3f8c945db71558a9c4602425bf2502870a9686abdf9ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A3F 5564 bytes
font_01_sfnt_off0000ad41.bin
ebd4d38fa153f8d6f3eccb6fc2858fe33c8616345a4aa1b927f4a0033ad10d96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD41 10124 bytes
font_02_sfnt_off0000cfe8.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE8 4324 bytes

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