Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ee348d58e4c3ab…

MALICIOUS

PDF

45.0 KB Created: 2020-10-08 17:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 88cc79553b25d4fbf5fdbdcc5d2d9d79 SHA-1: f64c31cdf5da7bdbe2885ab5a736e02743a76841 SHA-256: 70ee348d58e4c3ab595cd0f4974038a8ef2946b0eaa45c7286456ea8e923b5ab
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. This suggests a phishing or redirection attempt to a malicious site. No scripts were extracted, but the presence of multiple external links and the ML classifier's high confidence indicate malicious intent.

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://cctraff.ru/strik?keyword=blues+scale+bass In PDF document text
    • http://files.kerriwrites.com/uploads/1/3/2/3/132303353/c9d8d369.pdfIn PDF document text
    • http://vunex.la-arts-district.com/uploads/1/3/1/1/131164250/kegakevumatupuxedo.pdfIn PDF document text
    • http://files.sabiland.com/uploads/1/3/1/4/131407197/ronij.pdfIn PDF document text
    • http://pekuruto.fosterperrytravelevents.com/uploads/1/3/2/6/132681233/5105885.pdfIn PDF document text
    • http://files.inyourcitymusic.com/uploads/1/3/1/3/131382274/4144885.pdfIn PDF document text
    • http://gibot.palmsprings-personalinjurylawyer.com/uploads/1/3/1/8/131857580/vimozax-vuvefikojesega-novifivedube.pdfIn PDF document text
    • http://files.theglasgowgroup.org/uploads/1/3/0/7/130738507/862564.pdfIn PDF document text
    • http://zorumot.yrpm.ca/uploads/1/3/0/7/130775565/763de2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9612/2561/files/iowa_wind_and_solar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/shiny_ski_resort_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1524/8293/files/40763287104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8588/1759/files/29209077154.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000684f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x684F 4424 bytes
SHA-256: 0b5fa320a00d077e5c3eb7a7058ff6fe381ed4493f2fd68593265a76acf48d33
font_01_sfnt_off0000774f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x774F 9912 bytes
SHA-256: d68f45d4cf0c913a0dfd887b0a244a137b3caec3af31de836f0cfcb8c09ba90a
font_02_sfnt_off0000994b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x994B 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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