Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ef36cdc0e2f693…

MALICIOUS

PDF

56.2 KB Created: 2020-10-26 10:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 73022951eaeaaa164a92d3725b618e1f SHA-1: 386499e45c70dc91fa04c876779adf5e81341db5 SHA-256: 46ef36cdc0e2f6932f49538b0f97eb33e0dfbde470fda09d7a9c3aafdd965608
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm and a direct link to a known malicious redirector. The document body, though obfuscated, contains the text "Trauma brain injury guidelines" and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous external PDF links further indicates a link farm strategy, likely for SEO manipulation or to host further malicious content.

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/123?keyword=trauma+brain+injury+guidelines In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/7218716.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/zaramafabidan-nebevu-nanoxafasomarak-kijiketikenef.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/883903d.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/e71d5b95e089.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/tinuboxaxamidosoku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_5f8c437ecda24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372735/normal_5f8b06cb75be7.pdfIn 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/1/0498/9308/1287/files/summarizing_worksheets_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7305/1042/files/27080725664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7946/7162/files/hesston_4600_baler_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2135/1587/files/31811645970.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/the_very_hungry_caterpillar_text.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/75143802741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7431/2110/files/parallel_space_apk_latest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3525/7753/files/gunozazuwoxuvufufozuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2012/3801/files/hobby_lobby_springfield_il_jobs.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_off00009bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BCC 5412 bytes
SHA-256: 9021e564cb75256620eba3404a0f3953fdc40f21e2302985df840089e60dce1f
font_01_sfnt_off0000ae1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE1E 11096 bytes
SHA-256: e282485e3d9881e9a6e7a93bd7e0df864a9754aabd4963ce37fd978a5d381479

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