Malicious PDF — malware analysis report

Static analysis result for SHA-256 13dda00d9e7903fc…

MALICIOUS

PDF

52.6 KB Created: 2020-08-11 00:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 846d941c0b1ed8968ee210d3149347fb SHA-1: d0823cd4f3877effb3fe9c581f96877e4aae5db1 SHA-256: 13dda00d9e7903fc05630399fce5b51a5d58c709ed5e858b59763f4b5da75bec
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a banking exercise. It also hosts a large number of links to other PDFs, suggesting a link farm or SEO poisoning attempt. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious intent to redirect the user to harmful content.

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=exercice+rapprochement+bancaire+pdf
    • http://files.thefreemath.org/uploads/1/3/1/4/131438161/bf27b.pdf
    • http://tepojo.missrosieweddingsandevents.com.au/uploads/1/3/1/6/131606407/wuzikiwijatom.pdf
    • http://files.fullmetalempiricist.com/uploads/1/3/1/4/131453056/3651516.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0448/2197/1104/files/declaracion_de_busqueda_activa_de_empleo.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/civil_engineering_reference_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8456/files/jebaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/0034/7299/files/89675999474.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/mivekaxunukowefisalisu.pdf
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/tugaforedijajesaregozux.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/nexus_2_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/vakutizabixenerosotufun.pdf
    • https://cdn.shopify.com/s/files/1/0439/4464/0667/files/font_weight_css_react.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/64088724306.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d2f.bin
c4d1a53d937dc80cc27e4df479f32ca6cbda414fa749da358494056b5d309486		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2F 1644 bytes
font_01_sfnt_off0000755e.bin
0d1cd78e6872a1ee74ebff933314bf71ef57b792ee92ef1893781c71e5dbc83c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755E 5352 bytes
font_02_sfnt_off0000876b.bin
e6792a831d62ead29d739b78d8d00868f4591646d6fbbd5862acef2fd21727dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x876B 12228 bytes
font_03_sfnt_off0000adb1.bin
434aae299edf0176e671ab3bc0d322c8073aab91b2f5b9b6b437fcae9386e09a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADB1 16256 bytes

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