Malicious PDF — malware analysis report

Static analysis result for SHA-256 084217effcb8d15a…

MALICIOUS

PDF

43.1 KB Created: 2020-08-24 11:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a48c5c5b58b04142868d2a836bf90211 SHA-1: fae90d44a03d6a4f04d694d677cc9e5e41191118 SHA-256: 084217effcb8d15adfc4bad1ac26316bdc707737beb45d81e25b5f24ccb2a7ad
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://ttraff.com/pify?keyword=artificial+intelligence+in+medicine+pdf. The document body, though heavily obfuscated, contains this URL and numerous other links to PDF files hosted on Shopify and other domains, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness.

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=artificial+intelligence+in+medicine+pdf
    • http://wudugez.gdwebster.com/uploads/1/3/2/8/132814930/kasetepov.pdf
    • http://kojaj.rawworxs.com/uploads/1/3/1/4/131453247/tidupejosik-mobafalorile-lutodutajamudo-kazuxubosiba.pdf
    • http://files.pinegrovecogop.org/uploads/1/3/0/8/130874318/de351d21ce3806f.pdf
    • http://vabefi.drsunshinecellfoods.com/uploads/1/3/0/7/130775045/xuzolirasufogepos.pdf
    • http://files.athenspalittleleague.org/uploads/1/3/2/7/132712415/vamobatuxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1167/7083/files/47900700083.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/85104404386.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4659/files/vocabulary_list_for_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/56685141818.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5241/6672/files/rejatipezunizezokivave.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/lonmin_bursary_application_form_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0412/4571/files/rozomape.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/44095661602.pdf
    • https://cdn.shopify.com/s/files/1/0440/1525/5710/files/variable_frequency_drive_operation.pdf
    • https://cdn.shopify.com/s/files/1/0434/8136/6694/files/kudafatosof.pdf
    • https://cdn.shopify.com/s/files/1/0448/4576/0669/files/rg11_coaxial_cable_data_sheet.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_off000069fc.bin
c76e5b9223d1516ef9d232339590459b560ece486970bc1e6d0051a676868299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FC 5284 bytes
font_01_sfnt_off00007bd7.bin
737a4330acfa02b005ea2165bb845da7f4033e31d79dba4ee1115d6f979d58fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD7 10440 bytes

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