Malicious PDF — malware analysis report

Static analysis result for SHA-256 70649bb644eb86a8…

MALICIOUS

PDF

41.9 KB Created: 2020-08-06 16:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27cde2b6cde47808ff1b32bfcffcafa3 SHA-1: a95e66844c05af67eb2121d868e0bb72fb618780 SHA-256: 70649bb644eb86a8a68e10de0d8b83dfb9cfa1410d2ee455373027fd2a145963
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links directs to a known malicious redirector infrastructure, suggesting an attempt to lead users to harmful content. The document's content and structure indicate a link farm or SEO manipulation tactic designed to drive traffic to malicious sites.

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.ru/wb?keyword=upper%20extremity%20nerve%20glides%20pdf
    • http://belab.artbycierranicole.com/uploads/1/3/1/4/131438641/7147800.pdf
    • http://gutatazi.mehanphoto.com/uploads/1/3/1/1/131163635/dizodevag.pdf
    • http://rasaluse.aztecroguefoodsllc.com/uploads/1/3/1/4/131407406/c21b45e48e3a76.pdf
    • http://files.sngservicesplus.com/uploads/1/3/1/1/131164081/567266.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/1558281670.pdf
    • https://cdn.shopify.com/s/files/1/0439/4388/7016/files/bulugorepebapubatataden.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/suxuteregejo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/30188414785.pdf
    • https://cdn.shopify.com/s/files/1/0431/3117/5063/files/22869260077.pdf
    • https://cdn.shopify.com/s/files/1/0436/2305/5523/files/scientific_names_of_plants_and_animals_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6815/4278/files/male_genital_piercing.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9868/6119/files/vofup.pdf
    • https://cdn.shopify.com/s/files/1/0430/2284/4067/files/leguragonixonazojipamibik.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8565/files/nepevodewe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/90346670824.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/sciatica_treatment_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/managerial_accounting_journal.pdf
    • https://cdn.shopify.com/s/files/1/0440/6204/8421/files/15552950027.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_off00006698.bin
94cd9d622a863986f54af7ba85e3f05830b8eb7950ca6e0130c0e5e2484baab7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6698 5372 bytes
font_01_sfnt_off000078e6.bin
5feb0b9567694ada86d82bb36afcde1872a96f4ced6a1c3b7b2bddad0909a157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E6 9964 bytes

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