Malicious PDF — malware analysis report

Static analysis result for SHA-256 741ac9353328c495…

MALICIOUS

PDF

43.2 KB Created: 2020-08-10 16:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01e1b290e5031ba9ad68d1f7f0249905 SHA-1: 437b2e68be13fcfd09aaa2426a9715ff23c5d79d SHA-256: 741ac9353328c49550e22fb275f4ce6388eaae724c2139ba95ec507283cfa86d
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, indicating an attempt to lead the user to harmful content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure itself facilitates the redirection, suggesting a phishing or scam attempt.

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=email+format+sample+pdf
    • http://files.assembly2237.kofc.com/uploads/1/3/1/4/131437711/07286ab05.pdf
    • http://jupusowe.rtrbaseball.com/uploads/1/3/1/4/131406717/melez.pdf
    • http://files.rhombusspace.com/uploads/1/3/2/7/132712096/354262.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/awk_one_liners.pdf
    • https://cdn.shopify.com/s/files/1/0429/3305/9737/files/formula_para_calcular_porcentaje_de_grasa_corporal_con_pliegues.pdf
    • https://cdn.shopify.com/s/files/1/0431/4149/6981/files/ditozutasojedinix.pdf
    • https://cdn.shopify.com/s/files/1/0432/5005/7373/files/simple_definition_of_technology.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lujodegiduwidixerilaji.pdf
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/gallstone_diet_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/xudugedudiwotexajuwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0964/files/17204668418.pdf
    • https://cdn.shopify.com/s/files/1/0447/1917/7882/files/westlife_fool_again_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/3117/4039/files/40145971709.pdf
    • https://cdn.shopify.com/s/files/1/0437/7228/0981/files/tupimeruvimep.pdf
    • https://cdn.shopify.com/s/files/1/0428/8049/9879/files/45929111758.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/pumuw.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_off00006a85.bin
ce249662dc7af09f1659b64dcabdc15539e90a2692e1c75668ceac03b5507b56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A85 5144 bytes
font_01_sfnt_off00007be8.bin
2f418c78c5d1c417a32a388c8d1873fce4b2b404e720f314ce2591a234d16f74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE8 10620 bytes

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