Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d1949b783c9720…

MALICIOUS

PDF

101.4 KB Created: 2020-08-06 01:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e2d9991226e6d3667ca8830bddec8b3 SHA-1: 80ebf50e804876b65d965da06b6b7e67d13d7c4b SHA-256: 75d1949b783c97205977258b9205511fab75a9cb0273cb984888ee83c5328a1b
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The embedded URL, https://ttraff.cc/pify?keyword=personal+statement+for+scholarship+application+examples+pdf, is designed to lure users with a seemingly relevant document title. The presence of numerous external links suggests an attempt to manipulate search engine results or distribute malicious content. No scripts were extracted, but the PDF structure and embedded links strongly suggest a 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://ttraff.cc/pify?keyword=personal+statement+for+scholarship+application+examples+pdf
    • http://files.ox-fest.org/uploads/1/3/1/3/131398367/bozoku_rofamaz.pdf
    • http://files.aaronhunttheatre.com/uploads/1/3/1/3/131384573/xirigi.pdf
    • http://files.homelumberinc.com/uploads/1/3/0/9/130969633/2317922.pdf
    • http://files.understandingfantasybaseball.com/uploads/1/3/0/7/130775448/227ae79f2b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/juganixunokomoponimebo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7201/8845/files/demurikasujizode.pdf
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/bobudu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/kidokotojaberovunuvafe.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/ropovezupisijuvos.pdf
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/warosunupasuwulevezade.pdf
    • https://cdn.shopify.com/s/files/1/0440/0414/7350/files/3451362112.pdf
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/xuvukakakuna.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/xadezumoxutenidodevelaves.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2190/files/doxalakusoxoweka.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7884/files/xafalejonudipajadusos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.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_off00015092.bin
7ff249978c3c71af873bcd6e8f3ac2ec452ed16c4a8e4bdaa836583716c634e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15092 5464 bytes
font_01_sfnt_off00016308.bin
cb760cece434b77087a439c7f12e91e89594a165ae13361d8e536cf012842d3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16308 10668 bytes

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