Malicious PDF — malware analysis report

Static analysis result for SHA-256 750861c76c773805…

MALICIOUS

PDF

42.6 KB Created: 2020-08-24 21:33:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49be5feffc8b07620ffab9990a7dbe19 SHA-1: 2b64bcc97bda77d81c3265b97e581a86cc46fcc9 SHA-256: 750861c76c773805b3dc61fa4250350bdfab8bd3481671f7064805fa400ca9ab
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is part of an advance-fee scam. The document body, though heavily obfuscated, contains text related to coupons and discounts, reinforcing the scam lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to distribute malicious content or engage in SEO manipulation for fraudulent purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=churrascaria+plataforma+coupon+discount
    • http://files.ldgreen.org/uploads/1/3/1/3/131383981/2974974.pdf
    • http://files.episcopalchurchonedisto.org/uploads/1/3/0/7/130739895/julusetiliwejo-nevadutijumud-niwikulobefeni-zupebewunesir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/2222/0439/files/how_to_delete_tumblr_blog.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0983/files/network_cabling_tools.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9736/files/dodisimokitulazegax.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/traductor_de_portugues_a_espaol_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0438/3562/1536/files/aprender_a_leer_dehaene.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/54966096502.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/glossary_of_human_resource_management_terms.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0104/files/53951256822.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/dekasegenometaxowewabubi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6924/files/pl_sql_tutorial_free_download.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_off000059b9.bin
2152c8c147c2f08fcf06cbbeb12ae4e9aa60867a7e1a9bef9e08ced11327d6ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B9 5184 bytes
font_01_sfnt_off00006b2c.bin
f8e44705be216e6dd934f81e82fbbb5814d383c72847d0a5eec1447227439e27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2C 10700 bytes
font_02_sfnt_off00008f74.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F74 4324 bytes

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