Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f6406d599f8e6f…

MALICIOUS

PDF

40.6 KB Created: 2020-08-14 04:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0660a1257dd52be04c1c8879f2c042b2 SHA-1: 4c2ccfa122fb4e9f7d4676ae67522183a851724a SHA-256: 07f6406d599f8e6fae5bad96b6e09fd2f773b5ac786cb81f241f6e50d7a8de67
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 a link farm designed to redirect users to malicious infrastructure. The primary redirector URL is `https://ttraff.ru/pify?keyword=business+card+designer+plus+templates`. While no scripts were explicitly extracted, the heuristic `PDF_MALICIOUS_REDIRECTOR_LINK` suggests the PDF is designed to exploit PDF vulnerabilities or features to redirect users. The ML classifier also 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.ru/pify?keyword=business+card+designer+plus+templates
    • http://sewasim.ldupholsterymaui.com/uploads/1/3/0/8/130814328/05f914046a972e6.pdf
    • http://sunupaged.riafg.org/uploads/1/3/0/7/130775350/xepamafawurol-madilukekusumij-vuwunizozutizaf.pdf
    • http://files.dailydallypetpillow.com/uploads/1/3/1/1/131163620/jurumapadavul-wijiwuzemajigan-giratuj-tuxamufaju.pdf
    • http://folupa.lculb.com/uploads/1/3/1/6/131606066/kibifiwum-kototes-nogekap-sumol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/9711/0168/files/devil_in_a_new_dress_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/79064794366.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/ruvovezuliwaximumirojej.pdf
    • https://cdn.shopify.com/s/files/1/0438/2133/4690/files/rifazukefegewaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1195/5098/files/57413020861.pdf
    • https://cdn.shopify.com/s/files/1/0432/9170/5500/files/29153276775.pdf
    • https://cdn.shopify.com/s/files/1/0434/6540/8662/files/bogixubutuditagu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/nikerukuzodose.pdf
    • https://cdn.shopify.com/s/files/1/0434/4191/4018/files/arbol_de_decision_de_compra.pdf
    • https://cdn.shopify.com/s/files/1/0433/0723/7531/files/xatedazun.pdf
    • https://cdn.shopify.com/s/files/1/0451/0230/1349/files/northern_tool_air_compressor.pdf
    • https://cdn.shopify.com/s/files/1/0434/1963/1765/files/21464354619.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6396/files/51444650719.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_off00006106.bin
24143c22a2f8cce0aefa372814d986b688b8900bb39239a3c92d5dd9a159bb01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6106 5440 bytes
font_01_sfnt_off0000736d.bin
340e0b2085eb19584173c9673fefff2c316cedd2d47212f1f14c4c3533c04a97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736D 9992 bytes

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