Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d69b6681083ca73…

MALICIOUS

PDF

39.2 KB Created: 2020-09-01 05:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 187b97190041c94eb509360fe60cf1f0 SHA-1: d63a02ac93c18b0cc8d75195dfcbe5f9bc962f27 SHA-256: 5d69b6681083ca7366d4596ce1951486e2c56a44253d436c6b8bb281984556b3
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text referencing 'Deloitte thailand transparency report' and a URL that appears to be a lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content. No scripts were extracted, but the PDF structure and malicious link indicate a phishing or malware delivery attempt.

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=deloitte+thailand+transparency+report In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2678/9030/files/employee_recommendation_letter_sample_from_employer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4295/4661/files/44202330371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3494/3388/files/21900181279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3538/5243/files/56970278988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/wages_board_ordinance_sri_lanka_sinhala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/former_cigarette_smoker_icd_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0883/5234/files/97514191556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/23822266705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/xapamet.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/81d6a4_e5b8e76b136f417bae6a5edf872542c4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a18aa6_255c2a7247244b88928b5746ebb1dbd0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c068f8_e6f69d85a4a044d9b6dea8947ea3e30d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0560/6049/files/historia_de_los_derechos_humanos_resumen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/types_of_antonyms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/98735487421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8244/0103/files/32533473152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/89345582572.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cda.bin
e94831a40d414d155f18cfa6b61ca37ce2ed18f57414a9656a7ab66252e11bbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDA 5260 bytes
font_01_sfnt_off00006ec2.bin
c4c8cae095d159adcd5667ec7890585929962fb6ff52e8af83985a74c9381327		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC2 9728 bytes

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