Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1246b6475712bc…

MALICIOUS

PDF

40.5 KB Created: 2020-08-22 02:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2fd025e9dee36f7ecbcce87f7a5a56a SHA-1: 92060f27f649b0d9b1f42e83612d6948e8438d38 SHA-256: 6d1246b6475712bc2d21a3e9475b3a744099bb0ec20a1bf82acc30828f9fb569
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to distribute further malware or phishing content. The document body references 'ios beta 13 beta 7', a common lure for users seeking beta software, and also contains a large number of embedded links to various PDF files, many hosted on Shopify. The ML classifier strongly indicated maliciousness, supporting the presence of malicious redirector links.

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=ios+beta+13+beta+7
    • http://files.care4reefs.org/uploads/1/3/0/7/130738714/noteranerimi.pdf
    • http://files.thesilkfamilyproject.com/uploads/1/3/1/4/131437740/livig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1064/6435/files/vodawozexula.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/grief_and_loss_support_group_facilitator_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1373/files/kesulitan_belajar_bahasa_inggris.pdf
    • https://cdn.shopify.com/s/files/1/0438/5262/8118/files/toxig.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/munidegivu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6148/4437/files/hulu_live_tv_guide_missing_channels.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/7584036285.pdf
    • https://cdn.shopify.com/s/files/1/0441/2735/5032/files/calculus_stewart_answers_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/7294/5312/files/kiniwasotaguxab.pdf
    • https://cdn.shopify.com/s/files/1/0440/7230/4805/files/biografia_allan_kardec_marcel_souto_maior.pdf
    • https://cdn.shopify.com/s/files/1/0446/9332/3930/files/informe_de_auditoria_fiscal_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0445/7899/6383/files/ielts_listening_test_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/kufejetujirawinavolutuwu.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_off0000620f.bin
126a85f9e113162b729e696880e739a965bd78a604466e0c8e1c80b8f1971a82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620F 4924 bytes
font_01_sfnt_off000072ef.bin
0c7cb51cde9c07f28c6d9fe019c5c9b2d0620324fa703b1f51b2fba7f85b9e4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72EF 9952 bytes

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