Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fd44355f41ce40…

MALICIOUS

PDF

56.6 KB Created: 2020-08-20 21:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c330fb32ad37399fd499987ea0e1f13 SHA-1: 698b547225f8edd510397415c72575d9757e6ce3 SHA-256: 00fd44355f41ce40cab27dedbf7e46f49ae4dd1456f3c523469b769c99b7afaa
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised with a keyword related to downloading an application. The document also features a large number of embedded links, many pointing to Shopify, suggesting a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=showbox+apk+latest+version+apkpure
    • http://files.mexadventures.com/uploads/1/3/0/9/130969297/redugifa.pdf
    • http://fuwil.soarohio.org/uploads/1/3/0/8/130874113/jabaxosotelibo-mavitudul-volagexijufor.pdf
    • http://dowumitev.allangelslbk.org/uploads/1/3/0/7/130739695/8193103.pdf
    • http://files.kiddirama.com/uploads/1/3/2/6/132682204/mijilozotiko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9242/6405/files/nevonafokejamavuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/15351175979.pdf
    • https://cdn.shopify.com/s/files/1/0437/6634/9975/files/cateye_padrone_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7805/0201/files/92129565725.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/tativebutemuzapujijuga.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/fefax.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/39234228105.pdf
    • https://cdn.shopify.com/s/files/1/0433/4888/5662/files/19412686134.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8932/files/vapijusape.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rapuz.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_off00009f34.bin
23fbf70342efd999c6a01f40e4974dd3583f588d57f19fe85b370434019a321c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F34 5432 bytes
font_01_sfnt_off0000b1bd.bin
6b66361e57db0e124b81dea5ad6ecca60685c49dd41f56986cb661ca1a6c0d5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1BD 10588 bytes

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